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Wyoming trails · Seneca Lake

Seneca Lake

A 4.6-mile out-and-back in Wyoming, with 426 ft of climbing. Reaches Barbara Lake and other lake destinations. Managed by USFS 040307.

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Length
4.6 mi
Elevation gain
426 ft
Difficulty
Moderate
Max grade
42%
Steepest mile
+395 ft
Tread at ≥10% grade
1.5 mi
Shape
out-and-back
Surface
NATIVE MATERIAL
Bikes
no
Horses
yes
Managed by
USFS 040307

Elevation profile

9,977 – 10,398 ft1234

Most of the climbing sits in the middle third — 56% of the ascent, between mile 1.5 and mile 3.1. It gives back about 742 ft along the way, so it rolls rather than climbing steadily.

3-D terrain

3-D terrain view of Seneca Lake

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

Reaches

Heads up

Stream ford: expect at least one unbridged crossing.

Daylight at the trailhead

On October 14, 2026 — the day this page was generated — first light reaches this trailhead at 7:02 a.m., the sun rises at 7:30 a.m. and sets at 6:37 p.m., and the last usable light fades about 7:06 p.m. (MDT) — 11 h 07 min of daylight. At about 2.7 mph plus 30 minutes per 1,000 feet of climbing, the 9.2-mile round trip takes roughly 3 h 50 min, so leaving the trailhead at sunrise puts you back around 11:20 a.m. — 7 h 17 min before sunset.

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