Indian Grinding Rock State Historic Park

14881 Pine Grove-Volcano Road
Pine Grove, CA 95665

209-296-7488

Indian 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.

Please use "Flag This Place" to alert us about content that is inappropriate or needs immediate attention. Nothing you submit will be shared with other site visitors.
Explore the free AARP HomeFit Guide

AARP Events for Pine Grove

View All AARP Events

image of two AARP membership cards
Only $12 your first year with Automatic Renewal
  • Immediate access to your member benefits
  • Discounts on travel and everyday savings
  • Subscription to AARP The Magazine
  • FREE second membership
Join AARP
Already a member? Renew or Print Card

Contact AARP
California