Hospital Rock, Archaeological site in Tulare County, United States.

Hospital Rock is a large quartzite rock on the Middle Fork of the Kaweah River in Sequoia National Park, just off the Generals Highway. Its surface holds bedrock mortars and pictographs left by the Potwisha, who lived here in winter.

This rock formation was used by local Indigenous peoples for food processing over several hundred years, showing clear evidence of long-term occupation. Its listing on the National Register of Historic Places recognizes the site as having national importance for understanding Indigenous life in the region.

The site was used mainly in winter by the Potwisha, a band of the Yokuts, who ground acorns in bedrock mortars and painted pictographs on the rock. The name comes from Hale Tharp, who brought his injured brother-in-law John Swanson here in 1860 to be treated by local Native Americans.

The site is reachable by following marked trails with interpretive signage explaining the geological and cultural features along the way. Wear appropriate footwear since the rock surface can be slippery, especially after rain.

Hospital Rock is quartzite, not granite, and its bedrock mortars are among the traces left by the Potwisha, who lived here in winter; archaeological evidence points to settlement from around 1350. The site was listed on the National Register of Historic Places on 29 August 1977.