Mount Humphreys is an 11,019-foot-elevation (3,359-meter) mountain summit in Park County, Wyoming, United States.

Mount Humphreys is set on the boundary that Yellowstone National Park shares with Washakie Wilderness.

[1] Precipitation runoff from the mountain's south and west slopes drains into headwaters of Trappers Creek which is a tributary of the Yellowstone River, whereas the northeast slope drains into headwaters of Eagle Creek which is a tributary of the Shoshone River.

Topographic relief is significant as the summit rises over 2,600 feet (792 meters) above Eagle Creek in one mile.

Volcanoes of the early Eocene supplied the material that formed the mountain 50–55 million years ago, and here created the rugged terrain in Yellowstone Park.