In recognition of Earth Day on April 22, join the California Climate Action Corps community at one of the many volunteer opportunities throughout Earth Month of Climate Action. Show up for climate and register for an event in your community – together we can make a difference.
We can all help our communities safely with COVID-19
During these difficult times, Californians come together to help each other. You can start by joining the movement here:
In California, climate change is a threat to systems and people across the state. Climate change is an existential crisis. Each of us has a role to play. You can take meaningful action today to help communities across our state.
Featured Events
Community Climate Action Days
California Volunteers and our partners host Community Climate Action Days to bring us together to work on projects protecting communities from climate change while improving quality of life and access to green spaces. Sign up for the 4/18 Oakland Community Climate Action Day or the 4/25 Butte County Community Climate Action Day!
City Nature Challenge
Protecting biodiversity in California and beyond is as easy as taking pictures. Take part in the City Nature Challenge between April 24–27, 2026, by joining a bioblitz or observing on your own. The City Nature Challenge is an annual global urban nature census which works together with cities all over the world to document the plants, animals, and fungi that live and thrive in and around the places we call home. City Nature Challenge is organized by California Academy of Sciences and the Natural History Museum of Los Angeles County. For more information about City Nature Challenge events across California, please view this interactive map.
Climate Action Counts
Climate Action Counts is an effort to unite ONE MILLION Californians to take everyday climate actions at home and in your neighborhood. Take the pledge during Earth Month and be counted!
Earth Month Events
Use the search box: Find volunteer opportunities by entering your city or county name.
| Date | Organization | Event | Time | City | County | Sign up |
|---|---|---|---|---|---|---|
| 4/1 | Esperanza's Sanctuary | Baldwin Lake Habitat Restoration Project | Various | Big Bear | San Bernardino | Sign up |
| 4/1 | San Diego Parks | Alt. Spring Break Series: Habitat Restoration at Louis A. Stelzer County Park | 9:00 a.m. - 12:00 p.m. | Lakeside | San Diego | Sign up |
| 4/1 | Chico State University, Gateway Museum | Compost Zone Refresh and Compost Pail Distribution | 8:00 a.m. - 11:00 a.m. | Chico | Butte | Sign up |
| 4/2 | San Diego Parks | Alt. Spring Break Series: Tree and Trail Maintenance at Oakoasis County Preserve | 9:00 a.m. - 12:00 p.m. | Lakeside | San Diego | Sign up |
| 4/2 | City of Santa Clara | Earth Day/Arbor Day 2026 | 10:00 a.m. - 2:00 p.m. | Santa Clara | Santa Clara | Sign up |
| 4/3 | San Diego Parks | Alt. Spring Break Series: Native Plant Planting at Woodhaven County Park | 9:00 a.m. - 12:00 p.m. | El Cajon | San Diego | Sign up |
| 4/3 | Breathe Southern California (CCAC) | Plant trees with us! | 9:00 a.m. - 12:00 p.m. | Alhambra | Los Angeles | Sign up |
| 4/3 | Breathe Southern California | Plant trees with us! | 8:00 a.m. - 11:00 a.m. | Alhambra | Los Angeles | Sign up |
| 4/4 | California State Parks Foundation | Earth Day Volunteer Workday at Chino Hills State Park | 9:00 a.m. - 1:00 p.m. | Chino Hills | San Bernardino | Sign up |
| 4/4 | California State Parks Foundation | Earth Day Volunteer Workday at Candlestick Point State Recreation Area | 9:00 a.m. - 1:00 p.m. | San Francisco | San Francisco | Sign up |
| 4/4 | Amigos de los Rios - Emerald Necklace | Emerald Necklace Day at Peck Conservation Park | 9:00 a.m. - 2:00 p.m. | Arcadia | Los Angeles | Sign up |
| 4/4 | Arroyos & Foothills Conservancy | Rubio Canyon Habitat Restoration & Trail Maintenance | 8:00 a.m - 11:00 a.m. | Altadena | Los Angeles | Sign up |
| 4/4 | San Diego Canyonlands | Stewardship Saturday in Swan Canyon | 8:00 a.m. - 10:30 a.m. | San Diego | San DIego | Sign up |
| 4/4 | Marin Water | Mt. Tamalpais Trail Stewardship Day With Marin Water | 8:00 a.m. - 11:00 a.m. | Mt. Tamalpais State Park | Marin | Sign up |
| 4/4 | San Diego Parks | Alt. Spring Break Series: Tree Planting at Dos Picos County Park | 9:00 a.m. - 12:00 p.m. | Ramona | San Diego | Sign up |
| 4/4 | Northeastern University Oakland | Spring Creek Care Day | 10:00 a.m. - 12:00 p.m. | Oakland | Alameda | Sign up |
| 4/4 | City of Glendale | Earth Day 2026 | 10:00 a.m. - 1:00 p.m. | Glendale | Los Angeles | Sign up |
| 4/4 | City of Cupertino | Earth and Arbor Day Festival 2026 | 11:00 a.m. - 3:00 p.m. | Cupertino | Santa Clara | Sign up |
| 4/4 | Watershed Stewards Program | Shay Day 2026 | 10:00 a.m. - 2:00 p.m. | Arcata | Humboldt | Sign up |
| 4/4 | Watershed Stewards Program | SLO Creek Floodplain Preserve Restoration Event | 9:00 a.m. - 1:00 p.m. | San Luis Obispo | San Luis Obispo | Sign up |
| 4/4 | The San Diego River Park Foundation | Mission Valley Garden Club - Create a Monarch Garden | 9:00 a.m. - 11:00 a.m. | San Diego | San Diego | Sign up |
| 4/4 | Northeastern University Oakland | Spring Creek Care Day | 10:00 a.m. - 12:00 p.m. | Oakland | Alameda | Sign up |
| 4/4 | Paradise Gardeners | Paradise Hills Native Garden Planting and Work Day | 9:00 a.m. - 12:00 p.m. | San Diego | San Diego | Sign up |
| 4/4 | Aquarium of the Pacific | Los Cerritos Wetlands Habitat Restoration | 10:30 a.m. - 12:30 p.m. | Seal Beach | Orange | Sign up |
| 4/4 | Tree San Diego | Tree Distribution: Allied Gardens | 11:30 a.m. - 3:30 p.m. | San Diego | San Diego | Sign up |
| 4/4 | San Diego River Park Foundation | Plant native plants at Grant Park | 8:00 a.m. - 11:00 a.m. | San Diego | San Diego | Sign up |
| 4/5 | Russian Riverkeeper | Cloverdale Russian River Cleanup | 9:00 a.m. - 11:00 a.m. | Cloverdale | Sonoma | Sign up |
| 4/5 | Redwood Parks Conservancy | Help Restore Prairie at Prairie Creek State Park! | 10:00 a.m. - 1:00 p.m. | Orick | Humboldt | Sign up |
| 4/6 | Sierra Nevada Alliance | Community Litter Cleanup | 10:00 a.m. - 12:00 p.m. | South Lake Tahoe | El Dorado | Sign up |
| 4/8 | Theodore Payne Foundation for Wild Flowers & Native Plants | Seed Packet Filling Party | 1:00 p.m. - 4:00 p.m. | Los Angeles | Los Angeles | Sign up |
| 4/8 | LA Compost | Compost Hub Support: Sepulveda Garden Center | 8:00 a.m. - 12:00 p.m. | Los Angeles | Los Angeles | Sign up |
| 4/8 | Theodore Payne Foundation | Theodore Payne Foundation for Wild Flowers & Native Plants | 1:00 p.m. - 4:00 p.m. | Los Angeles | Los Angeles | Sign up |
| 4/8 | Mendocino Land Trust | Navarro Point Stewardship Day | 10:00 a.m. - 12:00 p.m. | Albion | Mendocino | Sign up |
| 4/8 | Los Angeles Climate Week and California Volunteers | LA Climate Week Kick-Off Event: Eaton Canyon Land Restoration | 8:00 a.m. - 12:00 p.m. | Altadena | Los Angeles | Sign up |
| 4/9 | Solana Center for Environmental Innovation | Preventing Food Waste at Home Webinar | 6:00 p.m. - 7:00 p.m. | Encinitas | San Diego | Sign up |
| 4/9 | Tree San Diego | City of San Diego Ready, Set, Grow Webinar | 12:00 p.m. - 1:00 p.m. | Online | Online | Sign up |
| 4/10 | City of Long Beach | Restoration Friday 2026 | 2:00 p.m. - 3:30 p.m. | Long Beach | Los Angeles | Sign up |
| 4/10 | Sequoia Riverlands Trust | Nursery Volunteer Day | 9:00 a.m. - 11:30 a.m. | Woodlake | Tulare | Sign up |
| 4/10 | Tree San Diego | Tree Distribution: Coastal Roots Farm | 10:00 a.m. - 1:00 p.m. | Encinitas | San Diego | Sign up |
| 4/10 | San Diego Canyonlands (CCAC) | Sips & Sagebrush at Mission Hills Canyon | 9:00 a.m. -11:30 a.m. | San Diego | San Diego | Sign up |
| 4/11 | California State Parks Foundation | Earth Day Volunteer Workday at Half Moon Bay State Beach | 9:00 a.m. - 1:00 p.m. | Half Moon Bay | San Mateo | Sign up |
| 4/11 | California State Parks Foundation | Earth Day Volunteer Workday at Baldwin Hills Scenic Overlook | 9:00 a.m. - 1:00 p.m. | Culver City | Los Angeles | Sign up |
| 4/11 | California State Parks Foundation | Earth Day Volunteer Workday at Montana de Oro State Park | 9:00 a.m. - 1:00 p.m. | Los Osos | San Luis Obispo | Sign up |
| 4/11 | California State Parks Foundation | Earth Day Volunteer Workday at China Camp State Park | 9:00 a.m. - 1:00 p.m. | San Rafael | Marin | Sign up |
| 4/11 | California State Parks Foundation | Earth Day Volunteer Workday at Silver Strand State Beach | 9:00 a.m. - 1:00 p.m. | Coronado | San Diego | Sign up |
| 4/11 | California State Parks Foundation | Earth Day Volunteer Workday at Folsom Powerhouse State Historic Park | 9:00 a.m. - 1:00 p.m. | Folsom | Sacramento | Sign up |
| 4/11 | Community Action for a Sustainable Alameda | Alameda Volunteer Coastal Cleanup | 10:00 a.m. - 12:00 p.m. | Alameda | Alameda | Sign up |
| 4/11 | City of Sacramento | City of Sacramento Earth Day | 9:00 a.m. - 12:00 p.m. | Sacramento | Sacramento | Sign up |
| 4/11 | San Diego Parks | Tree Giveaway at Lindo Lake County Park | Various | Lakeside | San Diego | Sign up |
| 4/11 | San Joaquin River Parkway and Conservation Trust | R.C. Garden Care Day | 9:00 a.m. - 12:00 p.m. | Fresno | San Joaquin | Sign up |
| 4/11 | Arroyos & Foothills Conservancy | Rosemont Preserve Habitat Restoration | 9:00 a.m. - 11:00 a.m. | La Crescenta-Montrose | Los Angeles | Sign up |
| 4/11 | City of Long Beach | Plantación de árboles en el Vecindario Central de Long Beach/Tree Planting in Central Long Beach | 9:00 a.m. - 12:00 p.m. | Long Beach | Los Angeles | Sign up |
| 4/11 | Amigos de los Rios - Emerald Necklace | Greening Monrovia High School - Site Care | 9:00 a.m. - 12:00 p.m. | Monrovia | Los Angeles | Sign up |
| 4/11 | Food Exploration and Discovery | St. Luke's Episcopal Church Work Day | 9:00 a.m. - 12:00 p.m. | Monrovia | Los Angeles | Sign up |
| 4/11 | Friends of the Dunes | HCNC Dune Restoration | 10:00 a.m. - 1:00 p.m. | Arcata | Humboldt | Sign up |
| 4/11 | City of Eureka | Sequoia Park Ivy League | 9:00 a.m. - 1:00 p.m. | Eureka | Humboldt | Sign up |
| 4/11 | Redwood Parks Conservancy | Help restore Trinidad State Beach! | 9:00 a.m. - 12:00 p.m. | Trinidad | Humboldt | Sign up |
| 4/11 | City of Monterey Park | Earth Day and Arbor Day Festival | 11:00 a.m. - 2:00 p.m. | Monterey Park | Los Angeles | Sign up |
| 4/11 | California State Parks Foundation | Earth Day at Silver Strand State Beach | 9:00 a.m. - 1:00 p.m. | Coronado | San Diego | Sign up |
| 4/11 | Food ED (Food Exploration and Discovery) | St Luke's Episcopal Church Work Day - Monrovia | 9:00 a.m. - 12:00 p.m. | Monrovia | Los Angeles | Sign up |
| 4/11 | Sustainable Solano | Community Tree Planting Day | 10:00 a.m. - 3:00 p.m. | Vallejo | Solano | Sign up |
| 4/11 | Yosemite Climbing Association | Mariposa Facelift 2026 | 8:00 a.m. - 1:00 p.m. | Mariposa | Mariposa | Sign up |
| 4/11 | Los Angeles County Sanitation Districts | Earth Day | 10:00 a.m. - 2:00 p.m. | Whittier | Los Angeles | Sign up |
| 4/11 | Tree San Diego | Kensington Talmadge Earth Day | 11:00 a.m. - 12:00 p.m. | San Diego | San Diego | Sign up |
| 4/11 | Tree San Diego | Tree Treks at Balboa Park (Route 1) | 10:00 a.m. - 11:30 a.m. | San Diego | San Diego | Sign up |
| 4/11 | Garden School Foundation | Garden School Foundation Compost and Gardening | 8:00 a.m. - 11:00 a.m. | Los Angeles | Los Angeles | Sign up |
| 4/11 | San Diego County Parks (CCAC) | Tree Giveaway at Lindo Lake County Park | Various | Lakeside | San Diego | Sign up |
| 4/11 | San Diego Canyonlands (CCAC) | Rooted & Rested in Hollywood/Pepper Canyon | 8:00 a.m - 10:30 a.m. | San Diego | San Diego | Sign up |
| 4/11 | Arroyos & Foothills Conservancy (CCAC) | Rosemont Preserve Habitat Restoration | 9:00 a.m. - 11:00 a.m. | La Crescenta-Montrose | Los Angeles | Sign up |
| 4/11 | San Francisco Environment Department | Tend the Wild: Volunteer with A Living Library! | 8:30 a.m. - 12:30 p.m. | San Francisco | San Francisco | Sign up |
| 4/12 | Theodore Payne Foundation for Wild Flowers & Native Plants | Outreach at the Native Plant Garden Tour | Various | Santa Monica | Los Angeles | Sign up |
| 4/12 | Arroyos & Foothills Conservancy | Sycamore Canyon Preserve Habitat Restoration | 9:00 a.m. - 11:00 a.m. | Glendale | Los Angeles | Sign up |
| 4/12 | Arroyos & Foothills Conservancy | Oak Stewardship Day at the Sunshine Preserve | 9:00 a.m. - 11:00 a.m. | Glendale | Los Angeles | Sign up |
| 4/12 | Amigos de los Rios | Greening Willard Elementary School | 9:00 a.m. - 12:00 p.m. | Pasadena | Los Angeles | Sign up |
| 4/12 | Arroyos & Foothills Conservancy Project | Oak Tree Care at Sunshine Preserve | 8:00 a.m. - 11:00 a.m. | Glendale | Los Angeles | Sign up |
| 4/13 | Sustain U | Compost Happens | 11:00 a.m. - 12:00 p.m. | Long Beach | Los Angeles | Sign up |
| 4/13 | Credo High School | Native Planting Day at Credo High School | 8:00 a.m. - 11:00 a.m. | Rohnert Park | Sonoma | Sign up |
| 4/14 | LA Compost | Compost Hub Support: Altadena-Bob Lucas Library | 9:00 a.m. - 10:30 a.m. | Altadena | Los Angeles | Sign up |
| 4/15 | Esperanza's Sanctuary | Baldwin Lake Habitat Restoration Project | 9:30 a.m. - 11:30 a.m. | Big Bear | San Bernardino | Sign up |
| 4/15 | Gardens To Grow In | Gardens To Grow In - Calaveras Senior Center Community Garden Volunteer Day | 8:00 a.m. - 11:00 a.m. | San Andreas | Calaveras | Sign up |
| 4/15 | Grassroots Ecology | Spring 2026 Redwood Grove Youth Stewards | 4:00 p.m. - 6:00 p.m. | Los Altos | Santa Clara | Sign up |
| 4/15 | Grassroots Ecology | Winter Youth Stewards at Stulsaft Park | 4:00 p.m. - 6:00 p.m. | Los Altos | Santa Clara | Sign up |
| 4/15 | Saint Mary's College (CCAC) | Garden Town Hall | 1:30 p.m. - 3:30 p.m. | Moraga | Contra Costa | Sign up |
| 4/16 | The San Diego River Park Foundation | Preserve Stewards | 9:00 a.m. - 1:00 p.m. | Julian | San Diego | Sign up |
| 4/17 | Frontline Catalysts | Reclaim Earth Day | 10:00 a.m. - 3:00 p.m. | Oakland | Alameda | Sign up |
| 4/17 | Sequoia Riverlands Trust | Nursery Volunteer Day | 9:00 a.m. -11:30 a.m. | Woodlake | Tulare | Sign up |
| 4/17 | _Frontline Catalysts | Cleanup, Beautification, and Native Planting at Peralta Creek | 8:00 a.m. - 11:00 a.m. | Oakland | Alameda | Sign up |
| 4/18 | City of Berkeley | Earth Day Cleanup | 9:00 a.m. - 11:00 a.m. | Berkeley | Alameda | Sign up |
| 4/18 | California State Parks Foundation | Earth Day Volunteer Workday Angel Island State Park | 9:30 a.m. - 3:20 p.m. | Sausalito | Marin | Sign up |
| 4/18 | California State Parks Foundation | Earth Day Volunteer Workday at Crystal Cove State Park | 9:00 a.m. - 1:00 p.m. | Newport Beach | Ventura | Sign up |
| 4/18 | California State Parks Foundation | Earth Day Volunteer Workday at Dos Rios | 9:00 a.m. - 1:00 p.m. | Modesto | Stanislaus | Sign up |
| 4/18 | San Francisco Environment Department | Clean up SOMA at the Green Business Expo and Earth Day Festival | 10:00 a.m. - 12:00 p.m. | San Francisco | San Francisco | Sign up |
| 4/18 | Shasta Environmental Alliance | Earth Day at Caldwell Park | 11:00 a.m. - 4:00 p.m. | Redding | Shasta | Sign up |
| 4/18 | Food Exploration and Discovery | Oak Avenue Intermediate School Volunteer Day | 8:00 a.m. - 11:00 a.m. | Temple City | Los Angeles | Sign up |
| 4/18 | Sierra Resource Conservation District | River Restoration Day | 8:00 a.m. - 2:00 p.m. | Fresno | San Joaquin | Sign up |
| 4/18 | City of Oakland | Earth Day Habitat Restoration - King Estate Open Space | 9:00 a.m. - 11:00 a.m. | Oakland | Alameda | Sign up |
| 4/18 | Santa Monica Mountains Fire Safe Council | Earth Day Planting | 9:00 a.m. - 12:00 p.m. | Agoura Hills | Los Angeles | Sign up |
| 4/18 | Marin Water | Mt Tamalpais Habitat Restoration Day | 9:00 a.m. - 12:00 p.m. | Mt. Tamalpais State Park | Marin | Sign up |
| 4/18 | Breathe Southern California | Final Phase of Building a Garden at Rio Hondo College! | 9:00 a.m. - 12:30 p.m. | Whittier | Los Angeles | Sign up |
| 4/18 | San Joaquin River Parkway and Conservation Trust | 2026:River Stewards | 9:00 a.m. - 12:00 p.m. | Fresno | San Joaquin | Sign up |
| 4/18 | Amigos de los Rios | Greening John Muir High School - Site Care | 9:00 a.m. - 12:00 p.m. | Pasadena | Los Angeles | Sign up |
| 4/18 | Arroyos & Foothills Conservancy | Sunshine Preserve Habitat Restoration | 9:00 a.m. - 11:00 a.m. | Glendale | Los Angeles | Sign up |
| 4/18 | City of Oakland | Carmen Flores Recreation Center Earth Day Event | 10:00 a.m. - 1:00 p.m. | Oakland | Alameda | Sign up |
| 4/18 | City of Glendale | Clothing Swap | 10:00 a.m. - 11:00 a.m. | Glendale | Los Angeles | Sign up |
| 4/18 | City of Glendale | Repair Cafe | 11:00 a.m. - 2:00 p.m. | Glendale | Los Angeles | Sign up |
| 4/18 | City of Berkeley | Earth Day Shoreline Cleanup | 9:00 a.m. - 11:00 a.m. | Berkeley | Alameda | Sign up |
| 4/18 | Environmental Education Coalition of Napa County | Earth Day Napa 2026 | 11:00 a.m. - 4:00 p.m. | Napa | Napa | Sign up |
| 4/18 | City of Oakland | 32nd Annual Earth Day | Various | Oakland | Alameda | Sign up |
| 4/18 | Pacific Beach Coalition | Earth Day and EcoFest 2026 | Various | Various | San Mateo | Sign up |
| 4/18 | Solano Resource Conservation District | Solano County Earth Day Cleanup | Various | Various | Solano | Sign up |
| 4/18 | Sustainable Monterey | Earth Day Marina | 10:00 a.m. - 2:00 p.m. | Seaside | Monterey | Sign up |
| 4/18 | Shasta Environmental Alliance | Shasta Earth Day | 11:00 a.m. - 4:00 p.m. | Redding | Shasta | Sign up |
| 4/18 | Noyo Food Forest | Noyo Food Forest’s 17th Annual Earth Day Festival | 12:00 p.m. - 5:00 p.m. | Fort Bragg | Mendocino | Sign up |
| 4/18 | South Lake Tahoe Earth Day | South Tahoe Earth Day Festival | 10:00 a.m. - 3:00 p.m. | South Lake Tahoe | Nevada | Sign up |
| 4/18 | Visit Bakersfield | Earth Day Festival | 10:00 a.m. - 3:00 p.m. | Bakersfield | Kern | Sign up |
| 4/18 | Earth Day Fresno | Earth Day Fresno 2026 | 10:00 a.m. - 4:00 p.m. | Fresno | Fresno | Sign up |
| 4/18 | City of Modesto | Earth Day in the Park | 10:00 a.m. - 2:00 p.m. | Modesto | Stanislaus | Sign up |
| 4/18 | City of Folsom | 3rd Annual Earth Day Celebration | 9:00 a.m. - 1:00 p.m. | Folsom | Sacramento | Sign up |
| 4/18 | Redlands Earth Day | A Day of Climate Action in Redlands | 12:00 p.m. - 3:00 p.m. | Redlands | San Bernardino | Sign up |
| 4/18 | City of Temecula | Earth & Arbor Day | 10:00 a.m. - 2:00 p.m. | Temecula | Riverside | Sign up |
| 4/18 | City of Riverside | Earth Day Celebration | 10:00 a.m. - 12:00 p.m. | Riverside | Riverside | Sign up |
| 4/18 | Santa Cruz County | Downtown Santa Cruz Earth Day Celebrations | 11:30 a.m. - 4:00 p.m. | Santa Cruz | Santa Cruz | Sign up |
| 4/18 | Ventura County Coast | Ventura Earth Day | 11:00 a.m. - 4:00 p.m. | Ventura | Ventura | Sign up |
| 4/18 | Visit Atascadero | Party for the Planet" Earth Day Celebration | 10:00 a.m. - 1:00 p.m. | Atascadero | San Luis Obispo | Sign up |
| 4/18 | SLO Earth Fest | SLO EarthFest 2026 | 11:00 a.m. - 5:00 p.m. | San Luis Obispo | San Luis Obispo | Sign up |
| 4/18 | The San Diego River Park Foundation | Garden Party at Grant Park | 8:00 a.m. - 12:00 p.m. | San Diego | San Diego | Sign up |
| 4/18 | Sequoia Riverlands Trust | Stewardship Day | 9:00 a.m. - 12:00 p.m. | Exeter | Tulare | Sign up |
| 4/18 | California State Parks Foundation | Earth Day at Dos Rios | 9:00 a.m. - 1:00 p.m. | Modesto | Stanislaus | Sign up |
| 4/18 | The Urban Collaborative Project | Earth Day Extravaganza | 9:00 a.m. - 1:00 p.m. | San Diego | San Diego | Sign up |
| 4/18 | The Watershed Project | Wildcat Creek Cleanup Shields-Reid Planting Day (2 events) | 9:00 a.m. - 11:00 a.m. | Richmond, CA | Contra Costa | Sign up |
| 4/18 | Food ED (Food Exploration and Discovery) | Oak Avenue Intermediate School Volunteer Day - Temple City | 9:00 a.m. - 12:00 p.m. | Temple City | Los Angeles | Sign up |
| 4/18 | City of Pico Rivera | City of Pico Rivera Earth Day Event + Community Clean Up | 9:00 a.m. - 2:00 p.m. | Pico Rivera | Los Angeles | Sign up |
| 4/18 | Solana Center for Environmental Innovation | Gardening Practices that Save Water Workshop | 10:00 a.m. - 12:00 p.m. | Lakeside | San Diego | Sign up |
| 4/18 | Solana Center for Environmental Innovation | La Mesa Earth Day | 10:00 a.m. - 4:00 p.m. | La Mesa | San Diego | Sign up |
| 4/18 | SLO Climate Coalition | SLO EarthFest 2026 | 11:00 a.m. - 5:00 p.m. | San Luis Obispo | San Luis Obispo | Sign up |
| 4/18 | Friends of the LA River | Habitat Restoration & Earth Month Celebration | 8:00 a.m. - 11:00 a.m. | Van Nuys | Los Angeles | Sign up |
| 4/18 | Madera Coalition for Community Justice | Annual Madera Earth Day | 10:00 a.m. - 12:00 p.m. | Madera | Madera | Sign up |
| 4/18 | California Volunteers, Office of the Governor | East 12th Street Beautification Day | 9:30 a.m. - 1:00 p.m. | Oakland | Alameda | Sign up |
| 4/18 | California Volunteers, Office of the Governor | Earth Day Habitat Restoration - King Estate Open Space (KEOS) | 9:00 a.m. - 11:00 a.m. | Oakland | Alameda | Sign up |
| 4/18 | California Volunteers, Office of the Governor | Lincoln Square Park Tree Planting | 9:30 a.m. - 1:00 p.m. | Oakland | Alameda | Sign up |
| 4/18 | California Volunteers, Office of the Governor | FM Smith Recreation Center Community Gardens | 9:30 a.m. - 1:00 p.m. | Oakland | Alameda | Sign up |
| 4/18 | American River Conservancy | Cosumnes River Water Quality Monitoring | Flexible | Coloma | Various | Sign up |
| 4/18 | Keep Bakersfield Beautiful | Great American Cleanup | 8:00 a.m. - 1:00 p.m. | Bakersfield | Kern | Sign up |
| 4/18 | Heal the Bay | April Nothin’ But Sand Beach Clean Up | 10:00 a.m.Ê-Ê12:00 p.m. | Santa Monica | Los Angeles | Sign up |
| 4/18 | Tree San Diego | Tree Distribution: Campo Band of Mission Indians EPA | 10:00 a.m. - 1:00 p.m. | San Diego | San Diego | Sign up |
| 4/18 | Tree San Diego | La Mesa Earth Day Planting Demo | 11:45 a.m. - 12:45 p.m. | La Mesa | San Diego | Sign up |
| 4/18 | Akoma Unity Center | 5th Annual Earth Day & Family Celebration | 10:00 a.m. - 2:00 p.m. | San Bernardino | San Bernardino | Sign up |
| 4/18 | Hope Avenue | Hope Avenue Project - Community planter boxes and tree planting | 10:00 a.m. - 1:00 p.m. | Oakland | Alameda | Sign up |
| 4/18 | City of Pico Rivera Office of Sustainability Project | Tree Planting, Park Cleanup. and Collection Event for Pico Rivera Earth Day | 9:00 a.m. - 2:00 p.m. | Pico Rivera | Los Angeles | Sign up |
| 4/18 | San Francisco Beautiful | Earth Day Festival Kick-Off - Neighborhood Clean Up | 10:00 a.m. - 12:00 p.m. | San Francisco | San Francisco | Sign up |
| 4/18 | Groundwork Richmond | Help Maintain Trees on the Richmond Greenway | 9:00 a.m. - 12:00 p.m. | Richmond | Contra Costa | Sign up |
| 4/18 | Pacific Beach Coalition Project | Earth Day EcoFest | 9:00 a.m. - 11:00 a.m. | Pacifica | San Mateo | Sign up |
| 4/18 | University of Redlands | A Day of Climate Action in Redlands | 9:00 a.m. - 12:00 p.m. | Redlands | San Bernardino | Sign up |
| 4/18 | LA Compost | Community Compost Day LA | 9:00 a.m. - 1:00 p.m. | Los Angeles | Los Angeles | Sign up |
| 4/18 | Rio Hondo College Foundation | Río Hondo College Upcycling & Mending Clothing Workshop and Volunteer Event | 9:00 a.m. - 11:00 a.m. | Whittier | Los Angeles | Sign up |
| 4/18 | City of Oakland Parks, Recreation, & Youth Department | Mosswood Park Park Beautification | 9:30 a.m. - 11:30 p.m. | Oakland | Alameda | Sign up |
| 4/18 | Sustainable Claremont | Rain Garden Build & Install Volunteer Day | 9:00 a.m. - 4:30 p.m. | Claremont | Los Angeles | Sign up |
| 4/18 | Inland Empire Waterkeeper | Earth Month Stewardship and Sustainability Fair | 9:00 a.m. - 12:00 p.m. | Riverside | Riverside | Sign up |
| 4/18 | Sierra Service Project | International Garden of Many Colors Volunteer Day | 9:00 a.m. - 1:00 p.m. | Sacramento | Sacramento | Sign up |
| 4/18 | Central California Environmental Justice Network (CCAC) | Volunteer with us on Earth Day Fresno Festival | 8:00 a.m. - 4:00 p.m. | Fresno | Fresno | Sign up |
| 4/18 | San Diego County Parks (CCAC) | Earth Day Curbside Garden Planting at Lakeside Community Center | 10:00 a.m. - 12:00 p.m. | Lakeside | San Diego | Sign up |
| 4/18 | LA Works | Earth Month: Community Habitat Restoration | 9:00 a.m. - 12:00 p.m. | Los Angeles | Los Angeles | Sign up |
| 4/18 | Aldama Elementary School (CCAC) | Earth Day at Aldama | 9:00 a.m. - 1:00 p.m. | Los Angeles | Los Angeles | Sign up |
| 4/18 | California State University, Chico (CCAC) | Gateway Gardens Volunteer Day | 9:30 a.m. - 11:30 a.m. | Chico | Butte | Sign up |
| 4/18 | Carquinez Regional Environmental Education Center (CCAC) | Pollinator Party with CREEC at Revival Coffee | 9:30 a.m. - 11:30 a.m. | Crockett | Contra Costa | Sign up |
| 4/18 | City of Oakland (CCAC) | Oakland Earth Day! Union Plaza Community Garden & Compost Giveaway Event | 10:00 a.m - 11:30 a.m. | Oakland | Alameda | Sign up |
| 4/18 | Sierra Resource Conservation District (CCAC) | Earth Day Volunteering | 9:00 a.m. - 3:00 p.m. | Auberry | Fresno | Sign up |
| 4/18 | Saticoy Food Hub | Almond Repackaging | 10:00 a.m - 12:00 p.m. | Ventura | Ventura | Sign up |
| 4/18 | Gael Day of Service | Gael Day of Service | 9:00 a.m. - 11:00 a.m. | Moraga | Contra Costa | Sign up |
| 4/18 | Carquinez Regional Environmental Education Center (CCAC) | Native Garden Restoration Day | 9:30 a.m. - 11:30 a.m. | Martinez | Contra Costa | Sign up |
| 4/19 | Amigos de los Rios | Greening Madison Elementary - Site Care | 9:00 a.m. - 12:00 p.m. | Pasadena | Los Angeles | Sign up |
| 4/19 | Theodore Payne Foundation for Wild Flowers & Native Plants | Theodore Payne Foundation at LA Times Plants at the Festival of Books | 9:30 a.m. - 5:30 p.m. | Los Angeles | Los Angeles | Sign up |
| 4/19 | Town of Windsor | Earth Day Celebration | 10:00 a.m. - 1:00 p.m. | Windsor | Sonoma | Sign up |
| 4/19 | Friends of the Dunes | Ma-le'l Dunes Restoration | 10:00 a.m. - 1:00 p.m. | Arcata | Humboldt | Sign up |
| 4/19 | Nevada City Chamber of Commerce | 5th Annual Earth Fest Street Fair | 11:00 a.m. - 5:00 p.m. | Nevada City | Nevada | Sign up |
| 4/19 | Redwood Parks Conservancy | Help restore Big Dune in Tolowa State Park! | 10:00 a.m. - 2:00 p.m. | Crescent City | Del Norte | Sign up |
| 4/19 | Stockton Earth Day | Stockton Earth Day Festival | 10:00 a.m. - 4:00 p.m. | Stockton | San Joaquin | Sign up |
| 4/19 | Sustainable Seaside | 15th Annual Seaside Earth Day Celebration | 1:00 p.m. - 4:00 p.m. | Seaside | Monterey | Sign up |
| 4/19 | Greenspace Cambria | Greenspace Earth Day 2026 Celebration | 11:00 a.m. - 3:00 p.m. | Cambria | San Luis Obispo | Sign up |
| 4/19 | The San Diego River Park Foundation | San Diego River Mouth Habitat Restoration | 9:00 a.m. - 11:00 a.m. | San Diego | San Diego | Sign up |
| 4/19 | Sustainable Claremont | Earth Day Celebration | 8:30 a.m. - 1:00 p.m. | Claremont | Los Angeles | Sign up |
| 4/19 | Solana Center for Environmental Innovation | Rain Barrel Distribution | 10:00 a.m. - 1:00 p.m. | San Diego | San Diego | Sign up |
| 4/19 | Shark Stewards | Aquatic Park Habitat Restoration, Monitoring, and Cleanup | 10:00 a.m. - 1:00 p.m. | Berkeley | Alameda | Sign up |
| 4/19 | Keep Coyote Creek Beautiful | Habitat Restoration at Don Edwards San Francisco Bay National Wildlife Refuge | 8:45 a.m. - 12:00 p.m. | San Jose | Santa Clara | Sign up |
| 4/20 | Sierra Service Project | Mt. Calvary Missionary Baptist Church - Earth Day Volunteer Event | 9:00 a.m. - 1:00 p.m. | Sacramento | Sacramento | Sign up |
| 4/21 | CSU Dominguez Hills | 19th Annual CSUDH Earth Day Festival | 9:00 a.m. - 2:30 p.m. | Carson | Los Angeles | Sign up |
| 4/22 | California State University, Chico | AS Sustainability Tabling Sign-ups | 11:00 a.m. - 1:00 p.m. | Chico | Butte | Sign up |
| 4/22 | Agua Hedionda Lagoon Foundation | Earth Day Native Plant Project | 9:00 a.m. - 12:00 p.m. | Carlsbad | San Diego | Sign up |
| 4/22 | Town of Windsor | Earth Day Trash Cleanup | 3:00 p.m. - 5:00 p.m. | Windsor | Sonoma | Sign up |
| 4/22 | Keep Tahoe Blue | Tahoe Truckee Earth Day Festival | 11:00 a.m. - 5:00 p.m. | Olympic Valley | Nevada | Sign up |
| 4/22 | Ojai Valley Land Conservancy | Earth Day Volunteer Project | 8:00 a.m. - 4:00 p.m. | Ojai | Ventura | Sign up |
| 4/22 | Sierra Nevada Alliance | Wild & Scenic Film Festival | 5:00 p.m. - 9:00 p.m. | South Lake Tahoe | El Dorado | Sign up |
| 4/22 | Agua Hedionda Lagoon Foundation | Habitat Restoration Day | 9:00 a.m. - 12:00 p.m. | Carlsbad | San Diego | Sign up |
| 4/22 | California Creative Learning Academy (CCAC) | CalCreative Earth Day | 4:00 p.m. - 6:00 p.m. | Los Angeles | Los Angeles | Sign up |
| 4/23 | City of Chino | Earth Day Community Day | 4:00 p.m. - 7:00 p.m. | Chino | San Bernardino | Sign up |
| 4/24 | San Francisco Environment Department | 2026 Climate Action Youth Summit (CAYS)! | Various | San Francisco | San Francisco | Sign up |
| 4/24 | City of Porterville | Arbor Day Ceremony and Tree Planting | 12:00 p.m. - 1:00 p.m. | Porterville | Tulare | Sign up |
| 4/24 | Anza-Borrego Foundation | Anza-Borrego Desert State Park BioBlitz 2026 | 5:00 p.m. - 10:00 p.m. | Borrego Springs | San Diego | Sign up |
| 4/24 | Solana Center for Environmental Innovation | Salute to Agriculture Day | 7:30 a.m. - 2:30 p.m. | Valley Center | San Diego | Sign up |
| 4/24 | Tree San Diego | Chula Vista Arbor Day Planting and Distribution | 9:00 a.m. - 12:30 p.m. | Chula Vista | San Diego | Sign up |
| 4/24 | San Francisco Environment Department | City Nature Challenge Bioblitz at Yerba Buena Island 2026! | 9:30 a.m. - 1:00 p.m. | San Francisco (Yerba Buena Island) | San Francisco | Sign up |
| 4/24 | Tree San Diego | Chula Vista Arbor Day Planting and Tree Distribution | 8:00 a.m. - 11:00 a.m. | Chula Vista | San Diego | Sign up |
| 4/24 | Rancho Cielo Youth Campus | Hedgerow Planting Day | 9:00 a.m. - 1:00 p.m. | Salinas | Monterey | Sign up |
| 4/24 | Breathe Southern California | Plant trees with us in City of Alhambra | 9:00 a.m. - 12:00 p.m. | Alhambra | Los Angeles | Sign up |
| 4/24 | San Francisco Department of the Environment | 2026 Climate Action Youth Summit (CAYS)! | 9:00 a.m. - 12:30 p.m. | San Francisco | San Francisco | Sign up |
| 4/24 | Central California Environmental Justice Network (CCAC) | Plant Trees on Arbor Day | 8:30 a.m. - 11:30 a.m. | Fresno | Fresno | Sign up |
| 4/24 | Santa Monica Mountains Fund | City Nature Challenge: Sunset Habitat Survey at Rocky Oaks | 5:30 p.m. - 7:30 p.m. | Malibu | Ventura | Sign up |
| 4/24 | Chicken Ranch Rancheria of Me-Wuk Indians (CCAC) | Honoring Mother Earth Celebration - Yellow Iris Removal | 3:00 p.m. - 6:00 p.m. | Sonora | Tuolumne | Sign up |
| 4/24 | Santa Monica Mountains Fund | City Nature Challenge: Sunset Habitat Survey at Rocky Oaks | 5:30 p.m. - 7:30 p.m. | Malibu | Ventura | Sign up |
| 4/24 | Chicken Ranch Rancheria of Me-Wuk Indians (CCAC) | Honoring Mother Earth Celebration - Yellow Iris Removal | 3:00 p.m. - 6:00 p.m. | Sonora | Tuolumne | Sign up |
| 4/24 | City Nature Challenge | Tidepool Bioblitz at Pillar Point | 10:00 a.m. - 1:00 p.m. | Half Moon Bay | San Mateo | Sign up |
| 4/24 | Presidio Trust | iNaturalist Tutorials at Presidio Field Station(No registration required) | 11:00 a.m. - 4:00 p.m. | San Francisco | San Francisco | Sign up |
| 4/24 | CuriOdyssey | City Nature Challenge 2026 Marsh Hike at Coyote Point | 1:00 p.m. - 2:30 p.m. | San Mateo | San Mateo | Sign up |
| 4/24 | Los Angeles County Department of Parks & Recreation - Natural Areas | 2026 City Nature Challenge Data Collection | Recopilacion de Datos | 9:00 a.m. - 7:00 p.m. | La Puente | Los Angeles | Sign up |
| 4/24 | Santa Monica Mountains Fund and the National Park Service | Sunset Habitat Survey at Rocky Oaks Data Collection | Recopilacion de datos | 5:30 p.m. - 7:30 p.m. | Malibu | Ventura | Sign up |
| 4/24 | Sonoma State University (CCAC) | Sea Wolf Dig in Day (Sonoma State University) | 9:00 a.m. - 11:30 a.m. | Rohnert Park | Sonoma | Sign up |
| 4/25 | East Bay Regional Park District | Anthony Chabot Litter Pick-up (Oakland) | 9:00 a.m. - 12:00 p.m. | Oakland | Alameda | Sign up |
| 4/25 | East Bay Regional Park District | Crown Memorial State Beach Cleanup (Alameda) | 9:00 a.m. - 12:00 p.m. | Alameda | Alameda | Sign up |
| 4/25 | East Bay Regional Park District | Del Valle Shoreline Cleanup (Livermore) | 9:00 a.m. - 12:00 p.m. | Livermore | Alameda | Sign up |
| 4/25 | East Bay Regional Park District | Lake Chabot Garden Maintenance (Castro Valley) | 9:00 a.m. - 12:00 p.m. | Castro Valley | Alameda | Sign up |
| 4/25 | East Bay Regional Park District | Martin Luther King Shoreline Cleanups (Oakland) | 9:00 a.m. - 12:00 p.m. | Oakland | Alameda | Sign up |
| 4/25 | East Bay Regional Park District | Point Pinole Regional Shoreline Invasive Plant Removal (Pinole) | 9:00 a.m. - 12:00 p.m. | Pinole | Contra Costa | Sign up |
| 4/25 | East Bay Regional Park District | Quarry Lakes Shoreline Cleanup (Fremont) | 9:00 a.m. - 12:00 p.m. | Fremont | Alameda | Sign up |
| 4/25 | City of Santa Rosa | Earth Day Cleanup on Santa Rosa Creek | 9:30 a.m. - 11:30 a.m. | Santa Rosa | Sonoma | Sign up |
| 4/25 | City of Santa Rosa | Earth Day Cleanup on Roseland Creek | 9:30 a.m. - 11:30 a.m. | Santa Rosa | Sonoma | Sign up |
| 4/25 | City of Santa Rosa | Earth Day Cleanup on Roseland Creek | 9:30 a.m. - 11:30 a.m. | Santa Rosa | Sonoma | Sign up |
| 4/25 | Fire Safe Sonoma | 2026 CERT Challenge: Disaster Simulation | 7:00 a.m. - 4:00 p.m. | Santa Rosa | Sonoma | Sign up |
| 4/25 | Santa Monica Mountains Fire Safe Council | Goldspotted Oak BorerField Trip to East and Rice Canyon | 8:00 a.m. - 1:00 p.m. | Calabasas | Los Angeles | Sign up |
| 4/25 | San Diego Canyonlands | Stewardship Saturday in Hollywood/Pepper Canyon | 8:00 a.m. - 10:30 a.m. | San Diego | San Diego | Sign up |
| 4/25 | Amigos de los Rios | Greening Jackson Elementary - Site Care | 9:00 a.m. - 12:00 p.m. | Altadena | Los Angeles | Sign up |
| 4/25 | Food Exploration and Discovery | Spring Care Day at Plymouth Elementary School - Monrovia | 9:00 a.m. - 12:00 p.m. | Arcadia | Los Angeles | Sign up |
| 4/25 | Earth Discovery Institute | BioBlitz & Spring Flower Hike | 9:00 a.m. - 11:00 a.m. | El Cajon | San Diego | Sign up |
| 4/25 | Food Exploration and Discovery | Spring Care Day at Bradoaks Elementary School - Monrovia | 9:00 a.m. - 12:00 p.m. | Monrovia | Los Angeles | Sign up |
| 4/25 | City of Long Beach | City Nature Challenge 2026 | 9:00 a.m. - 12:00 p.m. | Long Beach | Los Angeles | Sign up |
| 4/25 | LA Works | Earth Day Clean-Up - Restore & Rewild the Tujunga Canyon | 9:30 a.m. - 12:30 p.m. | Los Angeles | Los Angeles | Sign up |
| 4/25 | Frontline Catalysts | Earth Day: Seeds of Change (by CALI youth!) | 10:00 a.m. - 12:00 p.m. | Oakland | Alameda | Sign up |
| 4/25 | City of Hayward | Citywide Clean-up and Community Fair | 9:00 a.m. - 12:00 p.m. | Hayward | Alameda | Sign up |
| 4/25 | City of San Mateo | Earth Day Bayfront Cleanup 2026 | 9:00 a.m. - 12:00 p.m. | San Mateo | San Mateo | Sign up |
| 4/25 | Food Bank of Contra Costa and Solano | Fairfield Warehouse: Earth Day 2026 | Various | Fairfield | Solano | Sign up |
| 4/25 | Sanctuary Forest | Broom Bash | 10:00 a.m. - 2:00 p.m. | Whitethorne | Humboldt | Sign up |
| 4/25 | Friends of the Round Valley Public Library | Earth Day Celebration 2026 | 11:00 a.m. - 5:30 p.m. | Covelo | Mendocino | Sign up |
| 4/25 | City of Moreno Valley | 2026 Community Day of Service | 8:00 a.m. - 12:00 p.m. | Moreno Valley | Riverside | Sign up |
| 4/25 | Community Environmental Council | Community Environmental Council Earth Day | 11:00 a.m. - 8:00 p.m. | Santa Barbara | Santa Barbara | Sign up |
| 4/25 | Anza-Borrego Foundation | Anza-Borrego Desert State Park BioBlitz 2027 | 6:00 a.m. - 12:00 p.m. | Borrego Springs | San Diego | Sign up |
| 4/25 | City of El Cerrito | El Cerrito Earth Day Work Parties | 9:00 a.m. - 12:00 p.m. | El Cerrito, CA | Contra Costa | Sign up |
| 4/25 | City of El Cerrito | El Cerrito Repair Workshop | 1:00 p.m. - 4:00 p.m. | El Cerrito, CA | Contra Costa | Sign up |
| 4/25 | River District | Trails in Bloom: A Celebration of Nature, Culture, & Community | 11:00 a.m. - 2:00 p.m. | Sacramento | Sacramento | Sign up |
| 4/25 | Mount Shasta Bioregional Ecology Center | Earth Day Festival | 11:00 a.m. - 10:00 p.m. | Mount Shasta | Siskiyou | Sign up |
| 4/25 | Frontline Catalysts | Earth Day: Seeds of Change | 10:00 a.m. - 2:00 p.m. | Oakland | Alameda | Sign up |
| 4/25 | Food ED (Food Exploration and Discovery) | Spring Care Day at Bradoaks Elementary School | 9:00 a.m. - 12:00 p.m. | Monrovia | Los Angeles | Sign up |
| 4/25 | Food ED (Food Exploration and Discovery) | Spring Care Day at Plymouth Elementary School | 9:00 a.m. - 12:00 p.m. | Monrovia | Los Angeles | Sign up |
| 4/25 | Sustainable Solano | Benicia & Vallejo Annual Demonstration Food Forest Tour | 9:00 a.m. - 4:00 p.m. | Benicia Vallejo | Solano | Sign up |
| 4/25 | San Benito County Integrated Waste Management | San Benito County IWM Earth Day Celebration | 11:00 a.m. - 2:00 p.m. | San Juan Bautista | San Benito | Sign up |
| 4/25 | Heal the Bay | BioBlitz at the Manhattan Beach Dunes | 10:00 a.m. - 12:00 p.m. | Manhattan Beach | Los Angeles | Sign up |
| 4/25 | Tree San Diego | Tabling at Oceanside Earth Day | 11:00 a.m. - 3:00 p.m. | Oceanside | San Diego | Sign up |
| 4/25 | City of San Jose, Office of Mayor Mahan | City of San Jose, Office of Mayor Mahan Wildfire Prevention Project | 8:00 a.m. - 11:00 a.m. | San Jose | Santa Clara | Sign up |
| 4/25 | Friends of Ballona Wetlands | Habitat Restoration and Wildfire Resiliency at Ballona Wetlands | 9:30 a.m. - 12:00 p.m. | Playa del Rey | Los Angeles | Sign up |
| 4/25 | Food Exploration and Discovery (Food ED) | Spring Care Day | 8:00 a.m. - 11:00 a.m. | Monrovia | Los Angeles | Sign up |
| 4/25 | Growing Hope Gardens | Growing Hope Gardens Super Planting Day | 8:00 a.m. - 11:00 a.m. | Santa Monica | Los Angeles | Sign up |
| 4/25 | Butte Environmental Council | Organic Waste Diversion with Butte Environmental Council | 9:00 a.m. - 2:00 p.m. | Chico | Butte | Sign up |
| 4/25 | Butte County Fire Safe Council | Stewardship & Wildlife Education with the Butte County Fire Safe Council | 9:00 a.m. - 2:00 p.m. | Chico | Butte | Sign up |
| 4/25 | Chico State University | Urban Greening and Organic Waste Diversion at Chico State University | 9:00 a.m. - 2:00 p.m. | Chico | Butte | Sign up |
| 4/25 | Butte County Local Food Network | Organic Waste Diversion and Garden Maintenance With Butte County Local Food Network | 9:00 a.m. - 2:00 p.m. | Paradise | Butte | Sign up |
| 4/25 | Butte Environmental Council | Organic Waste Diversion at Southside Community Center | 9:00 a.m. - 2:00 p.m. | Oroville | Butte | Sign up |
| 4/25 | #REF! | Urban Greening at Bidwell Park | 9:00 a.m. - 2:00 p.m. | Chico | Butte | Sign up |
| 4/25 | Grassroots Ecology | Bioblitz at Shoreline Lake | 9:00 a.m. - 11:30 a.m | Mountain View | Santa Clara | Sign up |
| 4/25 | John Muir Land Trust | Bioblitz at Fernandez Ranch | 9:00 a.m. - 12:00 p.m. | Martinez | Contra Costa | Sign up |
| 4/25 | California Native Plant Society, Santa Clara Valley Chapter | Tabling and Bioblitz at the West Valley College Wildflower Show | 9:30 a.m. - 5:30 p.m. | Saratoga | Santa Clara | Sign up |
| 4/25 | Solano County Office of Education | Wildflower and Critter Walk at Jepson Prairie Preserve hosted by the Solano County Office of Education and the Solano Land Trust | 10:00 a.m. - 12:00 p.m. | Dixon | Solano | Sign up |
| 4/25 | Golden Gate National Parks Conservancy | Bioblitz at Lobos Creek | 10:00 a.m. - 12:30 p.m. | San Francisco | San Francisco | Sign up |
| 4/25 | Pepperwood Preserve | Wildflower and Nature Hike at Pepperwood Preserve | 10:00 a.m. - 1:00 p.m. | Santa Rosa | Sonoma | Sign up |
| 4/25 | Golden Gate National Parks Conservancy | Bioblitz at Bon Tempe Lake (Mt. Tamalpais), Marin County hosted by Marin Water, Golden Gate National Parks Conservancy, California State Parks, and San Francisco State University | 10:00 a.m. - 1:00 p.m. | Fairfax | Marin | Sign up |
| 4/25 | Rotary Nature Center Friends | Bioblitz at Lakeside Park in Lake Merritt | 10:00 a.m. - 1:00 p.m. | Oakland | Alameda | Sign up |
| 4/25 | California Academy of Sciences | Bioblitz at Bayview Hill Park hosted by California Academy of Sciences and Reimagining San Francisco | 1:00 p.m. - 3:00 p.m. | San Francisco | San Francisco | Sign up |
| 4/25 | Jack London State Historic Park | Bioblitz at Sugarloaf Ridge SP (in Spanish) | 3:00 p.m. - 5:00 p.m. | Kenwood | Sonoma | Sign up |
| 4/25 | City of Long Beach Office of Climate Action and Sustainability | City Nature Challenge at Willow Springs Park Data Collection & ID Party | Recopilacion de datos y fiesta de identificacion | 9:00 a.m. - 1:00 p.m. | Long Beach | Los Angeles | Sign up |
| 4/25 | Los Angeles World Airports Natural Resources Management | 2026 City Nature Challenge at the LAX Dunes Data Collection | Recopilacion de datos | 9:00 a.m. - 12:00 p.m. | Los Angeles | Los Angeles | Sign up |
| 4/25 | UCLA Geography | UCLA Stunt Ranch Reserve GSOB BioBlitz Data Collection | Recopilacion de datos | 9:00 a.m. - 1:00 p.m. | Calabasas | Los Angeles | Sign up |
| 4/25 | Heal the Bay | Bioblitz at the Manhattan Beach Dunes Data Collection | Recopilacion de datos | 10:00 a.m. - 12:00 p.m. | Manhattan Beach | Los Angeles | Sign up |
| 4/25 | Rancho Los Alamitos | City Nature Challenge at Rancho Los Alamitos Data Collection | Recopilacion de datos | 1:00 p.m. - 3:30 p.m. | Long Beach | Los Angeles | Sign up |
| 4/25 | Los Angeles County Department of Parks & Recreation - Natural Areas | 2026 City Nature Challenge Data Collection | Recopilacion de datos | 9:00 a.m. - 7:00 p.m. | La Puente | Los Angeles | Sign up |
| 4/25 | anta Monica Mountains Fund and the National Park Service | UV-Light Habitat Survey Data Collection | Recopilacion de Datos | 7:15 p.m. - 9:15 p.m. | Calabasas | Los Angeles | Sign up |
| 4/25 | California Department of Fish and Wildlife - Fresno (CCAC) | FINS Native Planting for Community Members | 9:00 a.m. - 12:00 p.m. | Friant | Fresno | Sign up |
| 4/25 | Chabot-Las Positas Community College District (CCAC) | Spring Harvest at Mohr Fry Property | 10:00 a.m. - 2:00 p.m. | Hayward | Alameda | Sign up |
| 4/26 | California Climate Action Now! Project | Bayview Ecological Corridors Tree Planting | 10:00 a.m. - 3:00 p.m. | San Francisco | San Francisco | Sign up |
| 4/26 | ECOS | ECOS Earth Day | 11:00 a.m. - 4:00 p.m. | Sacramento | Sacramento | Sign up |
| 4/26 | Fire Safe Sonoma | 2026 Wildfire and Earthquake Expo | 7:00 a.m. - 11:00 a.m. | Santa Rosa | Sonoma | Sign up |
| 4/26 | Amigos de los Rios | Greening Washington Elementary - Site Care | 9:00 a.m. - 12:00 p.m. | Pasadena | Los Angeles | Sign up |
| 4/26 | Community Environmental Council | Community Environmental Council Earth Day | 11:00 a.m. - 7:00 p.m. | Santa Barbara | Santa Barbara | Sign up |
| 4/26 | Green Change | Earth Day Marin 2026 | 12:00 p.m - 3:00 p.m. | Mill Valley | Marin | Sign up |
| 4/26 | Heal the Bay | Heal the Bay BioBlitz and Restoration Days | 9:00 a.m. - 12:00 p.m. | Pacific Palisades | Los Angeles | Sign up |
| 4/26 | Nature in the City | Nature in the City's Green Hairstreak Corridor Open House and Bioblitz | 10:00 a.m. - 1:00 p.m. | San Francisco | San Francisco | Sign up |
| 4/26 | San Francisco Environment Department | City Nature Challenge Bioblitz at Brotherhood Way 2026 with City Gurlz Hike! | 9:30 a.m. - 1:00 p.m. | San Francisco | San Francisco | Sign up |
| 4/26 | Keep Coyote Creek Beautiful | Alum Rock Park BioBlitz | 9:00 a.m. - 11:30 a.m. | San Jose | Santa Clara | Sign up |
| 4/26 | We Save the World | Bioblitz at Howarth Park | 9:00 a.m. - 12:00 p.m. | Santa Rosa | Sonoma | Sign up |
| 4/26 | San Francisco Environment Department | Bioblitz at Brotherhood with City Gurlz Hike | 9:00 a.m. - 1:00 p.m. | San Francisco | San Francisco | Sign up |
| 4/26 | Golden Gate Bird Alliance | Bioblitz at Pier 94 Salt Marsh Wetlands | 10:00 a.m.Ð12:00 p.m. | San Francisco | San Francisco | Sign up |
| 4/26 | Santa Monica Mountains Fund and the National Park Service | Morning Habitat Survey Data Collection | Recopilacion de Datos | 9:00 a.m. - 11:00 a.m. | Agoura Hills | Los Angeles | Sign up |
| 4/26 | Heal the Bay | Heal the Bay BioBlitz and Restoration Days- 2026 L.A. City Nature Challenge Data Collection | Recopilacion de datos | 9:00 a.m. - 12:00 p.m. | Los Angeles | Los Angeles | Sign up |
| 4/26 | Los Angeles County Department of Parks & Recreation - Natural Areas | 2026 City Nature Challenge Data Collection | Recopilacion de datos | 9:00 a.m. - 7:00 p.m. | La Puente | Los Angeles | Sign up |
| 4/27 | Los Angeles County Department of Parks & Recreation - Natural Areas | 2026 City Nature Challenge Data Collection | Recopilacion de datos | 9:00 a.m. - 7:00 p.m. | La Puente | Los Angeles | Sign up |
| 4/28 | Keep Coyote Creek Beautiful | City Nature Challenge Identification Party at Sonoma Willow Glen Library | 6:00 p.m - 9:00 p.m. | San Jose | Santa Clara | Sign up |
| 4/29 | FIND Food Bank (CCAC) | Positive Impact Patrol: FIND Food Bank x La Quinta Police Department | 8:00 a.m. - 11:00 a.m. | Indio | Riverside | Sign up |
| 4/30 | Ultimate Restoration Unlimited | South LA Climate Action & Community Restoration Day | 8:00 a.m. - 11:00 a.m. | Los Angeles | Los Angeles | Sign up |
| 5/2 | Our City Forest | Urban Greening and Tree Planting Ida Jew Academy and George V. Boeger Middle School | 9:00 a.m. - 12:00 p.m. | San Jose | Santa Clara | Sign up |
| 5/4 | Mount Shasta Bioregional Ecology Center | Mt. Shasta Earth Day Festival 2026 | All Day | Mount Shasta | Siskiyou | Sign up |
| 5/16 | Grades of Green | Greener Days in the South Bay | 8:00 a.m. - 3:30 p.m. | El Segundo | Los Angeles | Sign up |
| 4/1 to 4/30 | Earth Month EcoChallenge | Earth Month Ecochallenge | 12:00 a.m. - 11:59 p.m. | Online | Global | Sign up |
| 4/15 and 4/18 | Siskiyou Land Trust | Friends of the Meadow - Spring Kickoff Events | 9:00 a.m. 12:00 p.m | Mt Shasta | Siskiyou | Sign up |
| 4/18 | California Volunteers, Office of the Governor | Habitat Restoration for Biodiversity at Oak Glen Park | 9:30 a.m. - 11:30 a.m. | Oakland | Alameda | Sign up |
| Ongoing | California Volunteers, Office of the Governor | Take the Climate Action Counts Pledge! | Ongoing | Online | Online | Sign up |
| Various | UC Davis Arboretum and Public Garden | Weed Out Stress! Campus Gardening Volunteer Days | Various | Davis | Yolo | Sign up |
| Various | California State University, Northridge (CCAC) | Garden Volunteer Hours - Spring 2026 | Various | Los Angeles | Los Angeles | Sign up |
| Various | Sonoma State University (CCAC) | SSU School Garden Days! | 12:00 p.m. - 2:00 p.m | Rohnert Park | Sonoma | Sign up |
| Various | UC Riverside, Office of Sustainability (CCAC) | R'Hours @ The R'Garden | 8:00 a.m. - 10:00 a.m. | Riverside | Riverside | Sign up |
| Various | Sonoma State University (CCAC) | SSU Native Garden /Butterfly Garden | 10:00 a.m. - 2:00 p.m. | Rohnert Park | Sonoma | Sign up |
| Various | Butte Environmental Council | Wormy Wednesday | Food Scraps Compost Integration | 9:00 a.m. - 11:30 a.m. | Chico | Butte | Sign up |
| Various | Frontline Catalysts | Peralta Creek Restoration Days | 1:30 p.m. - 3:30 p.m. | Oakland | Alameda | Sign up |
| Various | LA Works (CCAC) | Community Watering Day at La Esquinita Garden Park | 8:00 a.m. - 10:00 a.m. | Los Angeles | Los Angeles | Sign up |
| Various | Frontline Catalysts | Peralta Creek Restoration Days | 1:30 p.m. - 3:30 p.m. | Oakland | Alameda | Sign up |
| Various | Carquinez Regional Environmental Education Center (CCAC) | Garden Day at CREEC (Thursdays & Saturdays) | 10:00 a.m. - 2:00 p.m. | Crockett | Contra Costa | Sign up |
| Various | Butte County Local Food Network | Community Composting with Butte County Local Food Network | 7:30 a.m. - 12:00 p.m. | Chico | Butte | Sign up |
Looking for more ways to take climate action?
