Major peaks are: the North, Middle, and South Sisters (all above 10,000'), along with Broken Top, the best example in the Pacific Northwest of the effect of glaciation. Collier Glacier is the largest glacier in Oregon. Other geologic features include Rock Mesa, Collier Cone, and Yapoah Crater. Alpine meadows, waterfalls, lava fields, glaciers, and glacial lakes are abundant. Fish populations include brook and rainbow trout.
Three Sisters Wilderness area covers 286,708 total acres. There are approximately 260 miles of trail within the wilderness. The Pacific Crest National Scenic Trail traverses the wilderness for 40 miles. Most trails entering the wilderness begin in dense forests of Douglas-fir on the western slopes of the Cascades and ponderosa pine on the eastern slopes.
Forest in this Wilderness consists mainly of Douglas-fir, silver fir, sub-alpine fir, mountain hemlock, western hemlock, true fir, lodgepole pine, and ponderosa pine. Alpine meadows are abundant.
Help protect your Wilderness! Key areas in the Three Sisters Wilderness are heavily used. Recreation related impacts include: opportunities for solitude, loss of vegetation, soil compaction, erosion, loss of woody debris and waste and sanitation issues. Help reduce impacts by following Wilderness regulations and the 7 Leave No Trace stewardship principles.
At a Glance
Belknap Springs, Black Crater, Broken Top, Cougar Reservoir, Crane Prairie, Elk Lake, French Mountain, Harvey Mountain, Irish Mountain, Linnton Lake, Mt. Bachelor, North Sister, Packsaddle Mountain, South Sister, Sunstitute Point, Trout Creek Butte, Tumalo Falls, Waldo Mountain. Download free U.S. Forest Service Topo maps.
Buy maps online
Go to the National Forest Store.
Go to Wilderness.net for online maps and other important Wilderness information.
Trail and trailhead access to Three Sisters Wilderness:
From Bend, OR via Highway 46- Cascade Lakes Highway:
From Sisters, OR via Highway 242 and Forest Service Roads 15 and 16:
From the Willamette Valley via Old McKenzie Highway (State 242):