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Washington trails · Thomas Lake

Thomas Lake

A 3.5-mile out-and-back in Washington, with 717 ft of climbing. Reaches Dee Lake and other lake destinations. Managed by the U.S. Forest Service.

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Length
3.5 mi
Elevation gain
717 ft
Difficulty
Moderate
Max grade
20%
Steepest mile
+450 ft
Tread at ≥10% grade
0.7 mi
Shape
out-and-back
Managed by
U.S. Forest Service

Elevation profile

4,098 – 4,814 ft123

The climbing leans toward the middle third: 49% of the ascent falls between mile 1.2 and mile 2.3.

3-D terrain

3-D terrain view of Thomas Lake

USGS 3DEP ELEVATION × ESRI WORLD IMAGERY · VERTICAL ×1.5

Reaches

Heads up

Stream ford: expect at least one unbridged crossing.

Getting there

THOMAS LAKE #111 TH — parking nearby, restroom, water, fee site. About 3 h 03 min drive (123 mi, 5 of them unpaved) from Centralia. 46.00593, -121.83800 · directions

Daylight at the trailhead

On October 14, 2026 — the day this page was generated — first light reaches this trailhead at 6:52 a.m., the sun rises at 7:22 a.m. and sets at 6:23 p.m., and the last usable light fades about 6:53 p.m. (PDT) — 11 h 01 min of daylight. At about 2.7 mph plus 30 minutes per 1,000 feet of climbing, the 6.9-mile round trip takes roughly 3 h 17 min, so leaving the trailhead at sunrise puts you back around 10:39 a.m. — 7 h 44 min before sunset.

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