Mount Jefferson Wilderness, Wilderness area in the Cascade Range, Oregon, United States.
Mount Jefferson Wilderness encompasses over 111,000 acres across three Oregon counties, featuring alpine meadows, rocky slopes, numerous lakes, and the towering 10,497-foot Mount Jefferson peak with five surrounding glaciers.
Designated as a wilderness area in 1968 through Public Law 90-548, Mount Jefferson Wilderness became part of the National Wilderness Preservation System with additional protections added through the 1984 Oregon Wilderness Act.
The Warm Springs Indian Reservation shares a northeastern border with the wilderness, reflecting the area's significance to local Indigenous communities who originally called Mount Jefferson 'Seekseekqua' in their ancestral language.
Visitors can explore approximately 190 miles of trails including sections of the Pacific Crest Trail, but must follow Leave No Trace principles and carry topographic maps for safe navigation in this remote wilderness.
The wilderness contains over 150 small lakes situated mostly between 5,000 and 6,000 feet elevation, formed by ancient glacial activity and filled with trout populations in this high-altitude environment.
Location: Linn County
Location: Jefferson County
Location: Marion County
GPS coordinates: 44.67529,-121.79844
Latest update: July 23, 2025 15:18
Mount Jefferson
140 m
Lake Billy Chinook
35.7 km
Three Fingered Jack
22.1 km
Mount Washington
38.3 km
Detroit Lake
32.4 km
Opal Creek Wilderness
37.6 km
Detroit Dam
36.1 km
Blue Lake Crater
29.4 km
Bull of the Woods Wilderness
33.3 km
Hoodoo Butte
31.2 km
Olallie Butte
16.5 km
Hayrick Butte
31.2 km
Elliott Corbett Memorial State Recreation Site
29.6 km
Mount Washington Wilderness
38.3 km
Santiam Wagon Road
28.1 km
Clackamas Wilderness
25.1 km
Skylight Cave
37 km
Big Cliff Dam
39.3 km
Camp Pioneer (Oregon)
16.8 km
Camp Sherman Community Hall
28 km
Olallie Lake Guard Station
15.5 km
Jefferson Park Glacier
1.2 km
Whitewater Glacier
900 m
Marion Forks Guard Station
13.7 km
Pamelia Creek Bridge
12.6 km
Sand Mountain Field
34.5 km
Fish Lake Guard Station
34.4 km
Marion Creek Bridge
13.7 kmReviews
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