Indian Grinding Rock State Historic Park, Historic Native American park in Pine Grove, United States.

Indian Grinding Rock State Historic Park covers 135 acres in a small valley at 2,400 feet in the Sierra Nevada foothills, 9 miles northeast of Jackson. Its centerpiece is an outcropping of marbleized limestone holding about 1,185 mortar holes, the largest collection of bedrock mortars in North America. Open meadows and large valley oaks surround the rock, and a reconstructed Miwok village with a ceremonial roundhouse stands in the valley.

The park, established in 1962 on 135 acres, protects a marbleized limestone outcrop with about 1,185 mortar holes, the largest such collection in North America. The site was listed on the National Register of Historic Places in 1971, and a reconstructed Miwok village with a ceremonial roundhouse is registered as California Historical Landmark #1001.

The site's Miwok name, Chaw'se, means "grinding rock". A reconstructed Miwok village with a ceremonial roundhouse stands in the valley and is registered as California Historical Landmark #1001. The two-story Chaw'se Regional Indian Museum, built to echo roundhouse architecture, holds artifacts of the Northern, Central and Southern Miwok, Maidu, Konkow, Monache, Nisenan, Tubatulabal, Washoe and Foothill Yokuts.

The park offers campsites with fire rings and picnic tables, plus traditional bark houses for alternative lodging. Visitors should explore the grounds in good weather and bring plenty of water.

The park holds 1,185 mortar holes, the largest collection of bedrock mortars in North America. Chaw'se is one of only two known sites where mortars were deliberately decorated with petroglyphs, a pairing of rock art and grinding pits found nowhere else in California.