The Ashley National Forest encompasses about 1.4 million acres in northeastern Utah and southwestern Wyoming. Of the total acres, 276,175 are High Uintas Wilderness.

The national forest is located in three major areas: the northern and southern slopes of the Uinta Mountains, the Wyoming Basin, and the Tavaputs Plateau. Elevations range from 5,500 feet on the Green River to 13,528 feet at the summit of King’s Peak (the highest point in Utah). About 70 percent of the Ashley falls within the Uinta Mountains. This is the largest east-west trending mountain range in the lower 48 states.