Mt. Adams Wilderness envelops an ecologically complex landscape along the west slope of Mt. Adams and its summit. The 47,122 acres that comprise the wilderness area are a blend of dry east-side and moist west-side ecosystems, allowing diverse types of vegetation and wildlife to flourish. Several areas along the flanks of Mt. Adams have burned in wildfires over the last several decades, providing sharp contrast with the lush unburned forests nearby and a glimpse at how landscapes regenerate after fire. Volcanic activity on Mt. Adams spans many geologic eras, with the most recent activity occurring just 3,500 years ago. Multiple trails provide access to spectacular views of Mt. Adams, including its glaciers, mountain streams, meadows, open alpine forests and lava flows.

At an elevation of 12,276 feet, Mt. Adams is the second highest peak in Washington; however, with an 18-mile wide diameter it is the largest volcano by bulk in the state. Its glaciers, along with adjoining ridges and permanent snow fields, sport many climbing routes of varying difficulty to the summit. All involve a significant degree of inherent danger and risk. Contact the Mt. Adams Ranger District for information about climbing Mt. Adams. A Mt. Adams Climbing Permit is required from May 1^st to September 30^th for anyone age 16 and older traveling above 7000ft elevation on Mt. Adams, even if not attempting the summit.

The remoteness and wilderness character of Mt. Adams led to its designation as a wild area under the Forest Service U2 regulations in 1942 and ultimately to its inclusion in the Wilderness Act of 1964. This designation includes the summit of Mt. Adams, and thus Wilderness Regulations apply for those seeking adventure on its higher ridges and summit as well as those enjoying the meadows, forest, and lakes below.

Only the western half of Mt. Adams lies within the Mt. Adams Wilderness, managed by the US Forest Service. The eastern half of Mt. Adams lies within the Yakama Nation Indian Reservation and is managed by the tribe. The portion of the mountain on Yakama Nation lands is largely closed to recreation. Contact the Yakama Nation for information regarding areas open to recreation.