Martin Griffin Preserve will open for the spring and summer season on Saturday, May 4. 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 select Saturdays in spring, summer and fall, the Preserve is open to visitors.
Hours vary depending on season, please call ahead: 415.868.9244 ext. 110.
Spring and Summer Hours
Visit us Saturdays, May 4 through July 27, 10 a.m. - 4 p.m.
Visit Martin Griffin Preserve throughout our limited Summer Saturday Season, with Nature Guide-led walks, activities, or materials to open your eyes to our lovely preserve in a different way each week. Visitors are also welcome to hike our trails on their own, scoop up a newt at the ponds, peer at birds in Bolinas Lagoon through our scopes, enjoy a picnic under the redwoods, and more. Suggested donation $20.
- Hike 8+ miles of trails
- Learn from nature guides
- View abundant plants & wildlife
- Visit newt ponds
- Discover natural wonders in our
- Curiosity Room
- Picnic under redwoods
- Shop the nature bookstore Discount for members!
Themed Saturdays – Hikes and activities occur at 11am and 2pm:
- May 4th: Spring Opening Day! Hikes with David Herlocker
- May 11th: Banana Slug Hike!
- May 18th: Ferns & Flowers
- May 25th: Pond Day
- June 1: Magnificent Save: The Story of Martin Griffin Preserve
- June 8: Conifers of the Canyon
- June 15: Mountain Lion Day
- June 22: Dragonflies and Damselflies
- June 29: Forest Bathing and Nature Mindfulness with certified Forest Bathing instructor Joey (Iris) Heusler
- July 6: TBA
- July 13: Nature Journaling Day
- July 20: “It’s My Fault!” Earthquakes and the San Andreas
- July 27: Summer Celebration at MGP! (Closing Day)
Mother’s Day Picnic:
May 12th, 12:00pm - 2:00pm
A 50-year tradition benefitting ACR and Marin Audubon Click here to purchase tickets
READ 7x7's review of the Martin Griffin Preserve experience.
NATURE BOOKSTORE: Come browse our selection of field guides, local natural history books, stationery, 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.
DIRECTIONS: click here.
Visit us Saturdays, October 12, 19 and 26, 10 a.m. - 4 p.m.
Martin Griffin Preserve The preserve is closed for the season until Saturday, May 4.
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.
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 - 2018, 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 2019, 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