Mount Defiance Trail 1009

Mount Defiance Trail is within the Alpine Lakes Wilderness.  Depart the Ira Spring, Talapus Lake or Pratt Lake trailheads. Beginning at milepost 3.7 on the Pratt Lake Trail 1007 follow the ridge between the South Fork Snoqualmie River and the Pratt River Valley west for 6.8 miles.  Along the way enjoy great views, heather and huckleberry meadows and short side trips to Island Lake, Rainbow Lake and Mason Lake ending at Thompson Lake. Find Thompson Lake Trail 1009.1 and climb over a saddle and descend into the Granite Creek drainage. This trail is primarily used to go to several lakes between Pratt Lake and Mason Lake. Reach Mount Defiance by climbing up a ridge after passing Mason Lake.

Mount Defiance is known for its spectacular array of wildflowers, which bloom on south facing slopes from early to mid-July. Views of Mt. Rainier and the Snoqualmie River valley are breathtaking on a clear day. An unsigned boot trail scrambles up the west ridge to the summit of Mount Defiance. Continue ahead and down the back side of the mountain into the seldom-traveled valley of Thompson Lake.

Washington Trails Association

At a Glance

Usage: Light
Best Season: Summer/Fall
Restrictions: Wilderness regulations apply. Hiker only trail. Dogs must be on a leash.
Closest Towns: North Bend, Washington
Passes: A valid Recreation Pass is required at Pratt Lake trailhead.
Information Center: Check current conditions or call Snoqualmie Ranger District, North Bend Office at 425-888-1421.

General Information


Access from Pratt Lake Trailhead.

From North Bend, Wash., travel east on I-90 to exit 47. Turn north from the exit ramp and take a left at the "T" in the road. Drive 0.25 mile until the end of the road where the trailhead is located. Pratt Lake Trail leaves from the northwest side of the lot.

Hike the Pratt Lake Trail #1007 for 4.0 miles before coming to the junction with the Mount Defiance Trail #1009.

Recreation Map

Map showing recreational areas. Map Information


Day Hiking

Fire Information Use established rings for campfires.
Difficulty Level: More Difficult


Recreation Areas

Recreation Activities

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  Area/Length : 
6.8 miles

  Latitude : 

  Longitude : 

  Elevation : 
4200 feet - 5300 feet