This Wilderness was established in 1984, and contains approximately 37,440 rough acres with a major canyon and perennial stream extending its entire length. Deep pools of water may be separated by impassable falls. Elevations range from 3,000 feet along the lower end of Tonto Creek to 6,400 feet on Horse Mountain. Spring and fall are ideal times to visit this area, however trails are rare and access is limited. The tiny area known as Hell's Gate is not used by livestock due to inaccessibility.

A group size of no more than 15 people and no more than 15 head of pack or saddle animals of any type is enforced within this area yearlong.

• Summit Horse Mountain at an elevation of 6,400 feet.