Belknap Crater
The Mount Washington Wilderness covers an area of . First named a wild area by the United States Forest Service in 1975, it was designated as one of the original wilderness areas under the 1964 Wilderness Act. Located to the west of Bend, the Mount Washington plot is the smallest of three wilderness areas that encompass most of the High Cascades, a physiographic region located in the central part of Oregon; the two others are the Three Sisters Wilderness and Mount Jefferson Wilderness. Used mostly by hunters, hikers, and climbers, the Mount Washington area includes the Dee Wright Observatory, smaller volcanoes, and parts of the Pacific Crest Trail, which runs north–south through the wilderness for about . Other major features include Belknap Crater and 28 lakes. The wilderness area is jointly administered by authorities for the Willamette National Forest and Deschutes National Forest.