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Thomas Mountain

Snoqualmie Region > Cle Elum Area
47.2676, -121.1742 Map & Directions
8.0 miles, roundtrip
Elevation Gain
3,400 feet
Calculated Difficulty About Calculated Difficulty
Hiking up Thomas Mountain. Photo by HikerJim.
  • Mountain views
  • Summits
  • Lakes
  • Ridges/passes

Parking Pass/Entry Fee

Northwest Forest Pass
Saved to My Backpack

Climb to a summit between Cle Elum Lake and Lake Kachess. Route finding and climbing experience recommended. Continue reading

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Hiking Thomas Mountain

Cross Silver Creek and begin switchbacking upslope. The switchbacks are moderately steep but easy compared to what lies ahead. The trail remains flat on the ridge top for a short distance, where you can stop at a viewpoint and catch your breath just before it begins climbing again. This section has you gain 1,100 feet in just 1.3 miles, and another 1,300 feet in 1.7 miles lies ahead of you.

But the steep grade is balanced out by increasingly better views. Look for Mount Adams and Rainier, as well as Lake Easton below you. Upon reaching the ridge top, follow the track as it turns left, headed for Thomas Mountain.

The trail drops, heading via a wide track along the ridgeline. Enjoy mountain views, including Mount Stuart and the rest of the Teanaway peaks, because the summit is largely forested, with no views to the west. It is, however, open to the east and Cle Elum Lake is visible below.

On your return trip, keep your eyes down, watching your step despite the beautiful views laid out in front.

Thomas Mountain

Map & Directions

Co-ordinates: 47.2676, -121.1742 Open in Google Maps

Before You Go

See weather forecast

Parking Pass/Entry Fee

Northwest Forest Pass

WTA Pro Tip: Save a copy of our directions before you leave! App-based driving directions aren't always accurate and data connections may be unreliable as you drive to the trailhead.

Getting There

Take exit 70 from I-90. Turn left off off ramp. Cross the freeway and make a left. Drive .4 mile to Kachess Dam Rd. Go right. After .8 mile make a right on an unmarked road. Go about 1 mile to the end at trailhead.

More Hike Details


Snoqualmie Region > Cle Elum Area

Easton Ridge (#1212), Domerie Divide (#1308.2), Domerie Peak (#1308)

Okanogan-Wenatchee National Forest, Cle Elum Ranger District

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Thomas Mountain

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