Indian Grinding Rock State Park

State: Northern California

Address 1: 14881 Pine Grove-Volcano Road

City: Pine Grove

Zip: 95665

Phone: 209-296-7488

Open all Year: Yes

Number of Sites: 23

Camp URL:

Full Hook: Yes

Free: No

About: Indian Grinding Rock State Historic Park (IGR) is located in the Sierra Nevada foothills 12 miles east of Jackson. The park nestles in a little 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.

Restrictions: Maximum site length is 27 feet.

Directions: The park is northeast of Stockton in the lower foothills of the Sierra Nevada mountains. Take State Highway 88 East through Jackson to the town of Pine Grove. Take a left turn on Pine Grove-Volcano Road and approximately 1.5 miles later you will arrive at the park. The SECOND turnoff is the main entrance to the day use area while the first turn off is to the campground.