Sanhedrin Chapter

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Blue-eyed grass and oak woodland; Image: E. Johnson

Representing inland Mendocino and Lake counties

The Sanhedrin Chapter comprises inland Mendocino County and all of Lake County—from redwood forest, through mixed oak and conifer woodlands, the riparian corridors of the Russian and Eel rivers, the chaparral scrub and vernal pools of the Mayacamas Mountains, and higher up onto some of the loftiest peaks in the northern inner coast ranges.

Chapter Activities

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Field Trips

Inland Mendocino and Lake Counties are rich in native plant habitats. Check out our Facebook to see our guided hikes and plant walks to view the region’s botanical treasures.

Chapter Programs

Our field trips, evening presentations, and other events are free to the public unless noted. Both members and non-members are invited to attend. Sign up for our mailing list to receive information.

Volunteer Opportunities

Wild Gardening Wednesdays – Join us most Wednesdays at 8:30 am to garden in our public parks and wild spaces. Bring garden gloves and tools if you have them. Contact Andrea Davis for information at

Local Plant Lists

Mendocino and Lake County are full of botanical wonders. Learn about the plants near you and how to identify them. See our plant list and check out chapter resources on California Oaks.

Recommended Outings

Enjoy the fresh air and natural beauty of Low Gap Park in Ukiah. Visit the Park on Your Own: Download the Wildflowers of Low Gap Park, Ukiah Brochure

Native Plant Gardening

Native plants are a great way to support pollinators, conserve water, and bring California’s beauty right to your doorstep. See our recommended list of locally appropriate plants for your garden.

Upcoming Events

KZYX Radio Soundbytes

Listen to Sanhedrin radio spots recorded and broadcasted on KZYX.

About Our Chapter

From its origins in 1981, the Sanhedrin Chapter’s active core has invariably resided in the 40-mile-long inland valley corridor between Hopland to the south and Willits to the north. The chapter is named for Sanhedrin Mountain, one of the tallest peaks in the Mendocino National Forest. The ancient forests in the Sanhedrin Wilderness provide critical habitat for the continued survival of the northern spotted owl, including nesting sites.

Meet Our Local Leaders

Photo coming soon!

Cathy Monroe

Vice President

Photo coming soon!

Jim Xerogeanes


Photo coming soon!

Andrea Davis


Interested in becoming a member? Contact or fill out our Volunteer Survey.

Chapter Newsletter

Sign up for our newsletter for the latest on the chapter plant sale, recent field trips, and our conservation priority!

Chapter Newsletter

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1999 - 2017

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