Utah trails · Hades-Rocky Sea Pass
Hades-Rocky Sea Pass
A 10.4-mile out-and-back in Utah, with 1,057 ft of climbing. Reaches Hades Pass and other lake/pass destinations. Managed by the U.S. Forest Service.
Elevation profile
The climbing leans toward the first third: 49% of the ascent falls between mile 0.0 and mile 3.5. It gives back about 811 ft along the way, so it rolls rather than climbing steadily.
3-D terrain
USGS 3DEP ELEVATION × ESRI WORLD IMAGERY · VERTICAL ×1.5
Reaches
- Hades Pass (pass)
- Betsy Lake (lake)
- Lost Lake (lake)
- Bedground Lake (lake)
- Range Lake (lake)
- Heart Lake (lake)
- Rainbow Lake (lake)
- Rocky Sea Pass (pass)
Heads up
Getting there
GRAND VIEW TRAILHEAD — parking nearby, restroom. 40.56730, -110.82557 · directions
Daylight at the trailhead
On August 31, 2026 — the day this page was generated — first light reaches this trailhead at 6:21 a.m., the sun rises at 6:49 a.m. and sets at 7:57 p.m., and the last usable light fades about 8:25 p.m. (MDT) — 13 h 08 min of daylight. At about 2.7 mph plus 30 minutes per 1,000 feet of climbing, the 20.9-mile round trip takes roughly 8 h 47 min, so leaving the trailhead at sunrise puts you back around 3:36 p.m. — 4 h 21 min before sunset.
Loop options
- Grandaddy Lake + Hades-Rocky Sea Pass — 7.4 mi loop, 1,370 ft gain
Nearby trails
- East Fork Pinto Lake — 7.0 mi
- Notch Mountain — 10.2 mi
- Lofty Lake Loop — 10.6 mi
- Highline Trail — 10.8 mi