Indian Grinding Rock

Indian Grinding Rock State Historic Park is located in Pine Grove, California. The park is nestled in a small valley 2,400 feet above sea level with open meadows and large valley oaks that once provided the Native Americans of this area with an ample supply of acorns. The park was created in 1968 and preserves a great outcropping of marbleized limestone with some 1,185 mortar holes—the largest collection of bedrock mortars in North America. The Chaw’se Regional Indian Museum, located in the park, houses a variety of exhibits and artifacts from the Miwok and other California Indian tribes. The park also offers a variety of activities, including camping, picnicking, hiking, and bird watching.