Mt. Jefferson (10,497 feet) is the dominant feature of this High Cascades area, along with Three Fingered Jack (7,841 feet). Mt. Jefferson's slopes are mantled by five glaciers: Whitewater, Waldo, Milk Creek, Russell, and Jefferson Park. Other geographic features include steep talus slopes, rock outcrops, and alpine meadows. There are over 150 lakes, many stocked with trout.
Mt. Jefferson Wilderness covers 111,177 total acres. There are 163 miles of trail within this wilderness including a 40 mile stretch of the Pacific Crest Scenic Trail.
Vegetation is predominantly Douglas-fir, silver fir, sub-alpine fir, mountain hemlock, lodgepole pine, ponderosa pine, several species of cedar as well as species like vine maple, huckleberry and rhododendron.
At a Glance
BEWARE! Since 2003 Brush Ck, Minto Lake, Sugar Pine Ridge Trails and northern sections of Summit Trail have been in a "no current maintenance" condition. With heavy blowdown, dense brush, lack of identifiable trail surface and erosion due to B and B Fire damage, these trails are considered impassable and are not recommended. In recent years several hikers have reported becoming lost trying to follow these trails from the west, with a few turning into search and rescue missions.
||Wilderness Permits are required for both day use and overnight stays from Memorial Day Weekend until Oct. 31. Free permits are self-issued at the trailhead.
Limited Entry Area Permit required for the Pamelia Lake area.
||Wilderness restrictions apply.
The Pamelia Lake area requires a limited entry permit
Marion Lake Area ~ Management & Campfire Fire Ban
||Always carry water or a way to purify water
||Some trailheads require a recreation pass May 1st - September 30th. Check our Recreation Passes & Permits page for details.
Trail and trailhead access to Mount Jefferson Wilderness:
Near Sisters, OR and Highway 20:
See also: Willamette National Forest information about Mount Jefferson Wilderness.
Breitenbush Hotsprings, Candle Creek, Lions Head, Marian Forks, Marion Lake, Mt Bruno, Mt Jefferson, Olallie Butte, Santiam Junction, Three Fingered Jack. 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.