Park
Indian Grinding Rock State Historic Park preserves a 135‑acre Sierra foothills site where a marbleized limestone outcrop called Chaw’se contains the largest known collection of bedrock mortars in North America—about 1,185 mortar holes used by the Miwok to grind acorns and seeds for thousands of years.
The park features a reconstructed Miwok village and ceremonial roundhouse, a small museum (the Chaw’se Regional Indian Museum) with Indigenous artifacts and interpretive exhibits, and a raised boardwalk that lets visitors view the mortar pits and petroglyphs without harming the fragile surface.
Day‑use facilities include picnic areas, a campground on the south side, walking trails through oak‑savanna and meadow, and seasonal cultural programs and demonstrations that keep local Native traditions alive. Visitors should plan for hot summer days and cool evenings, follow site rules (stay on boardwalks and respect ceremonial areas), and check museum hours or program schedules before traveling since services are limited and seasonally operated.
| Address | 14881 Pine Grove Volcano Rd, Pine Grove, CA 95665, United States |
| Area | 107 ha |
| Established | 1962 |
| Management | California State Parks |
| Nearest City | Pine Grove, California |
| Phone | +1 209-296-7488 |
Indian Grinding Rock State Historic Park is located in California, United States.
Indian Grinding Rock State Historic Park is situated in the state of California.
The main phone number for the Indian Grinding Rock State Historic Park is +1 209-296-7488.
The address of Indian Grinding Rock State Historic Park is 14881 Pine Grove Volcano Rd, Pine Grove, CA 95665, United States.
Yes, Indian Grinding Rock State Historic Park is family-friendly and attracts visitors of all age groups.
Visitors usually spend a few hours to a full day exploring Indian Grinding Rock State Historic Park.
Yes, there are several hotels and accommodations near Indian Grinding Rock State Historic Park in California.
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