The Martin Griffin Preserve is open seasonally for visitors and schoolchildren to explore. In the fall and spring, the Preserve hosts its well-regarded nature education programs, which serve thousands of elementary schoolchilden every year. During the spring, summer and fall, the Preserve is open to visitors.
Hours vary depending on season, please call ahead: 415.868.9244 ext. 110.
Martin Griffin Preserve is OPEN for exploration on Saturdays: May 5 - July 28, 2018, 10:00am - 4:00pm
THEMED-EXPLORATION: Each Saturday visitors will find ACR's nature guides ready to lead folks on a themed-exploration, such as Pond Day, Mother’s Day, ACR History, Ferns and Flowers, Conifers of the Canyon, Wonders of the Forest Floor, Dragonflies & Butterflies, Nature Journaling, Mindfulness in Nature, and Herpetology Day! Check each Saturday on the calendar for a new theme! opportunities.
NATURE BOOKSTORE: 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. ACR members receive a 10% discount.
ADMISSION: Suggested donation of $20 per person supports our programs and management of the 5,000 acres of wildlife sanctuaries owned by ACR. All donations are greatly appreciated! Some programming is fee-based.
READ 7x7's recent review of the Martin Griffin Preserve experience.
Martin Griffin Preserve
4900 Shoreline Highway 1
Stinson Beach, CA
Click here for directions, map and public transit info.
Phone: 415.868.9244 ext. 110
The Preserve is located between the towns of Stinson Beach and Bolinas in west Marin County, California. Parking is very limited, carpooling is encouraged.
Visitors are encouraged to hike over eight miles of fern-lined trails, discover ponds with newts and other aquatic life, enjoy a picnic under the redwoods and explore our bookstore, as well as take in views of the birds on Bolinas Lagoon. On spring and summer weekends, ACR Nature Guides are on hand to lead hikes and answer questions about the history, stewardship and preservation of the Preserve.
To make an appointment during the week, call 415.868.9244 ext. 110
Looking for information on our Heronry?
For more than 70 years, Martin Griffin Preserve hosted one of the most significant and well-studied Great Blue Heron, Great Egret and Snowy Egret nesting sites on the West Coast, with as many as 175 breeding pairs of herons and egrets nesting in the tops of the redwood trees in Picher Canyon. In 2013 the Preserve nesting sites were abandoned in favor of others on the western shore of Bolinas Lagoon and elsewhere in the Bay Area. Although no one knows why the birds left, we suspect avian predators (Bald Eagles) as the likely cause.
While the herons and egrets did not return to Martin Griffin Preserve in 2014 - 2017, the productivity of the new nests established on the western side of the lagoon since 2013 indicates that the quality of feeding areas and the availability of food in Bolinas Lagoon has continued to be very good. In fact, egrets with successful (undisturbed) nests in the Bolinas colony were able to provision and fledge more young, on average, than egrets nesting in most other areas of the San Francisco Bay region.
Although we don’t know if the birds will return in 2018, ACR continues to monitor heron and egret nesting activities along Bolinas Lagoon. Get the latest updates here: http://egret.org/thebirds
Call 415.868.9244 ext. 110