Tolay Lake Regional Park is approximately 8 miles southeast of downtown Petaluma, in a valley between two ridgelines.
At 3,400 acres, Tolay Lake is the largest of Sonoma County's regional parks. It is named for the seasonal lake that forms in the valley between its surrounding hillsides. The park includes Tolay Creek, extensive grasslands, and open hillsides with views of San Pablo Bay, the San Francisco skyline and Bay Area peaks.
The park offers trails for hiking, mountain biking and horseback riding and is the site of the annual Tolay Fall Festival each October.
Tolay Lake Regional Park offers more than 11 miles of trails across mostly open grasslands and ridges. With the park's permanent opening in 2018, visitors have access to its southern acreage via an extension of the West Ridge Trail.
The park is known for its significant Native American and ranching histories. It also provides habitat for a variety of wildlife, especially golden eagles, burrowing owls and other birds of prey.