Volunteer Outdoors at Redwood Grove in Los Altos
Volunteer your time to help increase biodiversity in Los Altos at Redwood Grove Nature Preserve!
Día de los Muertos Celebracion en Cooley Landing
¡Celebre el Día de los Muertos con nosotros en actividades artesanales y musica para toda la familia!
Volunteer Outside at McClellan Ranch Preserve in Cupertino
Volunteer with Grassroots Ecology to steward a meadow ecosystem!
Burn Pile Build at Foothills Nature Preserve
Volunteer your time to build burn piles at Foothills Nature Preserve to reduce wildfire risk in Palo Alto!
Volunteer Outdoors in Palo Alto at Pearson-Arastradero Preserve
Restore biodiversity in a critical wildlife corridor!
Volunteer Outdoors in Palo Alto: Bioretention Area Maintenance at Southgate
Join us to help maintain the bioretention area at Southgate in Palo Alto.
Plant at Byrne Preserve in Los Altos Hills
Volunteer to install native plants to increase biodiversity at Byrne Preserve!
Seniors 65+: Volunteer Outdoors in Cupertino at McClellan Ranch Preserve
Help prune native plants and pull weeds in our meadow!
Volunteer Outdoors at Redwood Grove in Los Altos
Volunteer your time to help increase biodiversity in Los Altos at Redwood Grove Nature Preserve!
Volunteer Outside at McClellan Ranch Preserve in Cupertino
Volunteer with Grassroots Ecology to steward a meadow ecosystem!
Volunteer Outdoors in Alviso at the Burrowing Owl Project (18+)
Improve habitat for the threatened South Bay burrowing owl population. This opportunity is for those aged 18+.
Volunteer Outdoors in MV Shoreline Marsh Habitat Restoration
Volunteer your time with Grassroots Ecology to help increase biodiversity in Mountain View!
Morning Planting Party at Foothills Nature Preserve in Palo Alto
Volunteer your time to increase biodiversity at Foothills Nature Preserve in Palo Alto!
Afternoon Planting Party at Foothills Nature Preserve in Palo Alto
Volunteer your time to increase biodiversity at Foothills Nature Preserve in Palo Alto!
Volunteer Outdoors in Redwood City: Habitat Restoration at Redwood Creek
Volunteer with Grassroots Ecology to increase biodiversity in Redwood City!
Volunteer Outdoors in Menlo Park: Gardening for Pollinators at Alma Garden
Help increase and maintain the native biodiversity at Alma Pollinator Garden!
Night Hike at Pearson-Arastradero Preserve
Get in the Halloween spirit with a spoooky evening of after-dark nature exploration!
CNPS Native Plant Sale at Hidden Villa
Stock up for planting season during our plant sale at Hidden Villa, in partnership with the California Native Plant Society.
Volunteer Outdoors in East Palo Alto at Ravenswood
Join Grassroots Ecology to help increase biodiversity in East Palo Alto at Ravenswood Open Space Preserve!
Volunteer Outdoors in Palo Alto at Pearson-Arastradero Preserve
Volunteer your time to help increase biodiversity in Palo Alto at Pearson-Arastradero Preserve!
Volunteer Outdoors in MV Shoreline Marsh Habitat Restoration
Volunteer your time to help increase biodiversity in Mountain View at Shoreline!
Volunteer Outdoors at Redwood Grove in Los Altos
Volunteer your time to help increase biodiversity in Los Altos at Redwood Grove Nature Preserve!
Volunteer Outdoors in Alviso at the Burrowing Owl Project (18+)
Join us to improve habitat for the threatened South Bay burrowing owl population. This opportunity is for those aged 18+.
Volunteer Outside at McClellan Ranch Preserve in Cupertino
Volunteer with Grassroots Ecology to steward a meadow ecosystem!
Compassion Week: Volunteer Outdoors at Foothills Nature Preserve
Volunteer your time to prepare a planting area to increase biodiversity at Foothills Nature Preserve!
Volunteer Outdoors at Redwood Grove in Los Altos
Volunteer your time to help increase biodiversity in Los Altos at Redwood Grove Nature Preserve!
Sheet Mulch at Foothills Nature Preserve in Palo Alto
Volunteer your time to prepare a planting area to increase biodiversity at Foothills Nature Preserve!
Stinkwort Weeding Party at Byrne Preserve in Los Altos Hills
Join us for an early morning weeding party to help native plants thrive in the grassland at Byrne Preserve!
2026 Coastal Cleanup Day at Cooley Landing
Join us for California's largest cleanup event, Coastal Cleanup Day! Enjoy your time at the baylands and help pick up trash!
Volunteer Outdoors at Redwood Grove in Los Altos
Volunteer your time to help increase biodiversity in Los Altos at Redwood Grove Nature Preserve!
2026 Coastal Cleanup Day at San Francisquito Creek
Grassroots Ecology and the City of Menlo Park are partnering to host volunteers for Coastal Cleanup Day at San Francisquito Creek. Join us!
2026 Coastal Cleanup Day in Redwood City
Join California's largest cleanup event, Coastal Cleanup Day! Hosted by the City of Redwood City.
Boost Biodiversity at Russian Ridge Open Space Preserve
Celebrate California Biodiversity Day by volunteering at Russian Ridge Open Space Preserve!
Volunteer Outdoors at Redwood Grove in Los Altos
Volunteer your time to help increase biodiversity in Los Altos at Redwood Grove Nature Preserve!
Volunteer Outdoors in East Palo Alto at Ravenswood
Join Grassroots Ecology to help increase biodiversity at Ravenswood Open Space Preserve!
Sunset Restoration at Russian Ridge Open Space Preserve
Volunteer your time to help increase biodiversity at Russian Ridge Open Space Preserve!
Volunteer Outdoors at Redwood Grove in Los Altos
Volunteer your time to help increase biodiversity in Los Altos at Redwood Grove Nature Preserve!
Volunteer Outdoors in Palo Alto at Pearson-Arastradero Preserve
Join Grassroots Ecology to support biodiversity at a local nature preserve!
The Canvas of Nature: Naturalist Walk at Pearson-Arastradero Preserve
Join for a guided walk where we will capture the beauty of the preserve's flora, fauna, and landscapes through art!
Volunteer Outdoors in Alviso at the Burrowing Owl Project (18+)
Join us to improve habitat for the threatened South Bay burrowing owl population. This opportunity is for those aged 18+.
Sheet Mulch at Byrne Preserve in Los Altos Hills
Join us for an early morning of sheet mulching and weeding to help native plants thrive at Byrne Preserve!
Busy Bees at Bol Park: Gather Data for CNPS' New BUG Project!
Let's discover and document what lives in our native urban gardens.
Sunset Restoration in Portola Valley at Hawthorns
Volunteer with your time to help increase biodiversity at Hawthorns Area of Windy Hill Preserve.
BioBlitz at Baylands Park in Sunnyvale
Discover and document nature at Baylands Park with the Sunnyvale Public Library!