Mount Pennell is a prominent 11,413-foot (3,478 m) elevation summit located in eastern Garfield County, Utah, United States. Mount Pennell is the second-highest mountain in the Henry Mountains, following Mount Ellen, 10.6 miles to the north. It is situated in a dry, rugged, and sparsely settled region east of Capitol Reef National Park, on primitive land administered by the Bureau of Land Management. Several deep canyons cut the sides of the mountain, which on the higher slopes supports oak, Ponderosa pine, subalpine fir, spruce, Douglas fir, and aspen. Precipitation runoff from this mountain drains into tributaries of the nearby Colorado River.