The Henry Mountains are located in the southeastern portion of the U.S. state of Utah and run in a generally north-south direction, extending over a distance of about 30 miles (50 km). They were named by John Wesley Powell in honour of Joseph Henry, the first secretary of the Smithsonian Institution. The nearest town of any size is Hanksville, Utah, which is north of the mountains.
The Henry Mountains were the last mountain range to be added to the map of the 48 contiguous U.S. states (1872), and before their official naming by Powell, were sometimes referred to as the "Unknown Mountains." In Navajo, the range is still referred to as Dził Bizhi' Ádiní ("mountain whose name is missing").
Elevation: 11,522 ft (3,512 m)