Three Sisters Wilderness

The Three Sisters Wilderness is a wilderness area in the Cascade Range, within the Willamette and Deschutes National Forests in Oregon. It comprises , making it the second largest wilderness area in Oregon, after the Eagle Cap Wilderness. It was established by the United States Congress in 1964 and is named for the Three Sisters, three volcanoes. The wilderness boundary encloses the Three Sisters as well as Broken Top, which is southeast of South Sister.