Sonoma County Agricultural Preservation and Open Space District

Tolay Ranch Regional Park

This stunning and unique property is destined to become a new South County Regional Park. Purchased in fee and given to Regional Parks for development, it includes Tolay Lake, the largest freshwater lake in Sonoma County and the only one remaining in the San Pablo Bay watershed. Preserved wetlands and grasslands around the lake provide a critical habitat for red-legged frog, western pond turtle and other critters. You will be able to spend hours watching egrets, raptors, waterfowl and songbirds; enjoying the spectacular vistas as you hike or ride the miles of trails through the property’s gently rolling hills; listening to future rangers tell stories about the ancient Native American charmstones found on the property. Contact Regional Parks to participate in the community process defining the Park’s future.

View a map of all properties.

Quick Facts

1737 acres with the largest freshwater lake in Sonoma

Protected September 2005

Recreation | Natural Areas

Available by Tour Only