One Tam

Orange, black and white monarch butterfly seen landing on purple milkweed flowers.
Event
Drown Road Trailhead
Learn about community science efforts that document the western monarch butterfly migration each fall and winter, and contribute to the official count for fall 2022!
Staff and volunteers doing stewardship work in Muir Woods.
Volunteer
Muir Woods Visitor Center
The Golden Gate National Recreation Area (GGNRA) is turning 50 years old on October 27, 2022! Help us celebrate the 50th anniversary by rolling up your sleeves and giving the parks some TLC!
The Mill Valley-Sausalito multi-use path runs through Bothin Marsh
Event
Learn about how sea level rise is impacting Bothin Marsh and what One Tam is doing to help.
the green outline of Mt. Tamalpais is viewed against a blue sky. The photo is taken at an oblique angle, a trail leads from the bottom right among some white patches of fog.
Event
The One Tam Summit is a biannual program that brings together One Tam partner staff, scientists, students, and community members to learn about the health of Mt. Tamalpais in Marin County.
Green sweat bee (Agapostemon texanus) on flower
Event
Sky Oaks Watershed Headquarters
One Tam is continuing our efforts to monitor and understand more about Mt. Tamalpais’ wild bees and other pollinators. Community science volunteers play a critical role in this study by pinning, sorting, and labeling specimens collected from the field.
Green sweat bee (Agapostemon texanus) on flower
Event
Sky Oaks Watershed Headquarters
One Tam is continuing our efforts to monitor and understand more about Mt. Tamalpais’ wild bees and other pollinators. Community science volunteers play a critical role in this study by pinning, sorting, and labeling specimens collected from the field.
Green sweat bee (Agapostemon texanus) on flower
Event
Sky Oaks Watershed Headquarters
One Tam is continuing our efforts to monitor and understand more about Mt. Tamalpais’ wild bees and other pollinators. Community science volunteers play a critical role in this study by pinning, sorting, and labeling specimens collected from the field.
Green sweat bee (Agapostemon texanus) on flower
Event
Sky Oaks Watershed Headquarters
One Tam is continuing our efforts to monitor and understand more about Mt. Tamalpais’ wild bees and other pollinators. Community science volunteers play a critical role in this study by pinning, sorting, and labeling specimens collected from the field.
Mount Tamalpais
Events
Together the BayWood Artists and One Tam hope to help preserve and protect sensitive wetlands ecosystems.
Mount Tamalpais
Events
Together the BayWood Artists and One Tam hope to help preserve and protect sensitive wetlands ecosystems.