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.
Elevation profile
The climbing leans toward the middle third: 49% of the ascent falls between mile 1.2 and mile 2.3.
3-D terrain
USGS 3DEP ELEVATION × ESRI WORLD IMAGERY · VERTICAL ×1.5
Reaches
- Dee Lake (lake)
- Lake Umtux (lake)
- Naha Lake (lake)
- Heather Lake (lake)
- Blue Lake (lake)
- Rock Lake (lake)
- Little Rock Lake (lake)
- Lake Sahalee Tyee (lake)
- Eunice Lake (lake)
- Thomas Lake (lake)
Heads up
Getting there
THOMAS LAKE #111 TH — parking nearby, restroom, water. 46.00593, -121.83800 · directions
Daylight at the trailhead
On August 31, 2026 — the day this page was generated — first light reaches this trailhead at 5:55 a.m., the sun rises at 6:26 a.m. and sets at 7:47 p.m., and the last usable light fades about 8:18 p.m. (PDT) — 13 h 21 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 9:43 a.m. — 10 h 04 min before sunset.
Nearby trails
- Pacific Crest National Scenic Trail — 11.3 mi
- Lakes — 28.4 mi
- Boundary — 28.4 mi