Otis Peak–Flattop Mountain, 6 glaciers
15.7 mi · ▲ 5,009 ft · 7 hr 44 min
Otis Peak–Flattop Mountain, 6 glaciers is a 15.7-mile out-and-back in Rocky Mountain National Park near Beaver Point, CO. The route passes Flattop Mountain, Tyndall Glacier and Andrews Glacier before reaching Otis Peak at the turnaround, 7.8 miles in. It climbs 5,009 ft, with sections as steep as 35% grade, and is mostly dirt. It scores 43/100 on the Ambleway Wildness scale: green fringe.
Elevation
Getting there
Directions
Otis Peak–Flattop Mountain, 6 glaciers
15.7 mi · ▲ 5,009 ft · 7 hr 44 min
Elevation 8,827–12,695 ft
Out & Back · Rocky Mountain National Park
Trailhead: Bierstadt Lake/Storm Pass Trailhead · 40.32013, -105.62008
Weather Sep 5: Overcast, high 74°F / low 57° · precip 6% · wind 8 mph · sunrise 6:34 AM · sunset 7:31 PM
No dogs on part of this route · Transit-accessible: Bierstadt Bus Stop stop 296 m from the trailhead · Parking lot at the trailhead
- Start at the trailhead, heading W.
- 50 ftBear left, heading W.
- 0.1 miBear right onto Bierstadt Moraine Trail, heading W.
- 0.9 miContinue straight onto Bierstadt Lake Trail, heading NW.
- 0.1 miTurn left onto Bear Lake-Bierstadt Trail, heading NW.
- 1.3 miContinue straight onto Flattop Mountain Trail, heading SW.
- 3.7 miPass Flattop Mountain.
- 50 ftBear left, heading W.
- 0.2 miPass Tyndall Glacier.
- 0.4 miBear right, heading E.
- 50 ftSharp right, heading E.
- 0.9 miPass Andrews Glacier.
- 0.1 miReach Otis Peak, then turn around and head back the way you came.
- 1.1 miSharp left, heading N.
- 50 ftBear left, heading N.
- 4.3 miContinue straight onto Bear Lake-Bierstadt Trail, heading E.
- 1.3 miTurn right onto Bierstadt Lake Trail, heading E.
- 0.2 miContinue straight onto Bierstadt Moraine Trail, heading NE.
- 0.9 miBear left, heading E.
- 0.1 miBear right, heading SW.
- 50 ftArrive back at the trailhead.
Each distance is the walk from the previous step. Tap a step for a map of its junction.
Trail surface
Weather
Sunset
The best sunset spot on this hike is 6.2 mi in (~258 min). Leave by 2:53 PM for the 7:31 PM sunset. Back at your car by 10:19 PM, after dark — bring a headlamp.
Good to know
- No dogs on part of this route
- Transit-accessible: Bierstadt Bus Stop stop 296 m from the trailhead
- Parking lot at the trailhead
More from Bierstadt Lake/Storm Pass Trailhead Trailhead
- Bierstadt Lake Viewpoint & Bierstadt Lake via Bierstadt Moraine Trail 2.9 mi · ▲ 661 ft
- Bierstadt Lake–Bierstadt Lake Trail Loop, 3 sights 3.7 mi · ▲ 742 ft
- Glacier Creek Trail 4.8 mi · ▲ 499 ft
- Bierstadt Lake–Bierstadt Lake Trail Loop, 4 sights 5.1 mi · ▲ 950 ft
- Bierstadt Lake Trail–Hollowell Park Trail, 3 sights 7.6 mi · ▲ 1,758 ft
- Estes Cone–Storm Pass, 3 summits 9.3 mi · ▲ 2,278 ft
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