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Mount Defiance Trail #1009

Difficult
 4.0 (5)

A seldom-traveled trail from Mason Lake to Thompson Lake.


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Map Key

4.8

Miles

7.8

KM

Point to Point

5,148' 1,569 m

High

3,665' 1,117 m

Low

1,472' 449 m

Up

1,797' 548 m

Down

13%

Avg Grade (7°)

55%

Max Grade (29°)

Dogs Unknown

Features Lake · Swimming · Views · Wildflowers

Description

From the Ira Spring (Mason Lake) Trail #1038 or Island-Rainbow Trail, this trail heads due northwest. 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.

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, a 5584' peak. Continue ahead and down the back side of the mountain into the seldom-traveled valley of Thompson Lake.

Flora & Fauna

Numerous wildflowers, especially from early to mid-July.

Contacts

Shared By:

Emma Robson

Trail Ratings

  4.0 from 5 votes

#11021

Overall
  4.0 from 5 votes
5 Star
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4 Star
40%
3 Star
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2 Star
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1 Star
0%
Trail Rankings

#520

in Washington

#11,021

Overall
10 Views Last Month
775 Since May 11, 2016
Difficult

0%
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Photos

Meadow with wildflowers
May 18, 2016 near Riverbend, WA
Lake Thompson.
Jun 1, 2016 near Riverbend, WA

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Check-Ins

Oct 17, 2020
Ryan W
Jul 7, 2017
Ryan Burkhalter
Aug 18, 2016
Silke Cruz
Took a swim in Mason lake while on the way to the peak it was fantastic and the weather was amazing 4.8mi — 4h 30m
Jun 27, 2016
Steph Baron