Mt. Jefferson Wilderness: Willamette

Call ahead This experience may be open for on-site visitation; however, offerings and/or operating procedures may have changed due to COVID-19. Please verify details before you go and visit the COVID-19 Resources page for more information.

Mt. Jefferson 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 104,523 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.

Information about Valhalla Canyon

For trail information see:

Mt. Jefferson – Jefferson Park Trail Area
Mt. Jefferson – Marion Lake Trail Area

Mt. Jefferson – Maxwell Trail Area
Mt. Jefferson – Pamelia Lake Trail Area
Pacific Crest National Scenic Trail

Know Before You Go

  • ''Leave No Trace'' techniques are encouraged in Wilderness areas, including properly disposing of human and pet waste and carrying out all trash; click here for more information.
  • There are no facilities within the Jefferson Park area or the Wilderness area.