Visit the Martin Griffin Preserve

The 2015 Season: Putting Nature First

Open for Exploration: Volunteer Canyon

In keeping with ACR’s pledge to provide nature experiences, Volunteer Canyon will be open for public access. Available for exploring for the first time in decades, the canyon is adjacent to the temporarily-closed Picher Canyon. ACR is excited to give our community access to this special coastal Marin landscape and offer special learning opportunities.

See the calendar for visiting opportunities.

ACR’s Education Programs for students also continue in Volunteer Canyon, with no interruption to nature-based learning.

Picher Canyon and Historic Heronry Temporarily Closed 

ACR is committed to protecting the natural resources of its properties using science-based management. In an effort to promote reestablishment of the heron and egret nesting colony that was abandoned by the birds after 60 years, ACR will continue closure of Martin Griffin Preserve’s Picher Canyon during the 2015 nesting season.

Visiting in General

Created after stopping a freeway and marina development in West Marin, the preserve offers several hiking trails for exploring the canyons and their diverse ecosystems. Enjoy forests of Douglas fir, coast redwood and California bay, as well as open scrublands and breathtaking views of the Bolinas Lagoon and Pacific Ocean. Bring a picnic and enjoy this special nature preserve. 

See the Frequently Asked Questions page for more information. 

Nature Bookstore

The ACR Nature Bookstore, located on the Martin Griffin Preserve, is open when Picher Canyon is open to the public. Come browse our selection of field guides, local natural history books, stationary, gifts and nature-inspired toys and books for children. All proceeds from sales in the not-for-profit store help fund ACR programs.


phone 415.868.9244 ext 110