Trione-Annadel State Park

As of 11/10/17, Due to impacts from the Nuns Fires of October 2017, the area southeast of WP Richardson Fire Road/Canyon Fire Road will remain closed. Please see the Closed Area Document (PDF) from State Parks and the Superintendent’s Closure Order 660-17-055 (PDF) for additional details on the list of closed trails, or visit the official park website for the latest closure information.

Annadel State Park - trail map

Annadel State Park – trail map


A very popular 5,200 acre park with over 40 miles of interconnected trails, including an 8 ½ -mile section of the Bay Area Ridge Trail, popular with hikers, mountain bikers, and equestrians.  Great views of the Santa Rosa Plain and the Sonoma Valley and direct access to the adjacent Spring Lake Regional Park and Howarth Park. Camping is not allowed in the park, but fishing is at the 26-acre Lake Ilsanjo. Enjoy birding at Ledson Marsh, where 130 different bird species live or visit seasonally.

Ecosystems/Natural Features

Forest, oak trees, volcanic rocks, basalt, streams, riparian woodland, manzanita trees, lake, marsh, views, grasslands, meadows, wildflowers

Please Note

Dogs are not allowed on trails. Dogs on leash are allowed only on Channel Drive (paved road) within the park boundaries.

Download Annadel State Park Map

Official Website


Nearby Parks