WOUNDED KNEE: THE MUSEUM. Nez Perce National Historical Park - Nez Perce National Historical Park. National Museum of the American Indian. The Museum at Warm Springs - Warm Springs Museum - MuseumAtWarmSprings.org. Abbe Museum. Indian Grinding Rock SHP. About the ParkIndian Grinding Rock State Historic Park (IGR) is located in the Sierra Nevada foothills 12 miles east of Jackson, CA.
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. Location/DirectionsThe 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.