Mummy Cave is a rock shelter and archeological site in Park County, Wyoming, United States, near the eastern entrance to Yellowstone National Park. The site is adjacent to the concurrent U.S. Routes 14/16/20, on the left bank of the North Fork of the Shoshone River at an altitude of in Shoshone National Forest.
At its mouth, the cave is approximately wide, and it extends approximately into a volcanic cliff above the North Fork. It lies along the left bank of the river, next to the mouth of a small stream and opposite from the mouth of Blackwater Creek. The largest known cave along the North Fork, it is believed to have been carved by the river's flow; the reason for its diversion away from the alcove is unknown.
Mummy Cave was occupied between 7280 BC and AD 1580. Discovered by Cody resident Gen