Hallett Peak–Flattop Mountain, 5 summits
13.3 mi · ▲ 3,921 ft · 6 hr 24 min
Hallett Peak–Flattop Mountain, 5 summits is a 13.3-mile out-and-back in Rocky Mountain National Park near Beaver Point, CO. The route passes Flattop Mountain and Tyndall Glacier before reaching Hallett Peak at the turnaround, 6.7 miles in. It climbs 3,921 ft, with sections as steep as 29% grade, and is mostly dirt. It scores 38/100 on the Ambleway Wildness scale: green fringe.
Elevation
Getting there
Directions
Hallett Peak–Flattop Mountain, 5 summits
13.3 mi · ▲ 3,921 ft · 6 hr 24 min
Elevation 8,864–12,717 ft
Out & Back · Rocky Mountain National Park
Trailhead: Bierstadt Lake Trailhead · 40.32045, -105.62353
Weather Sep 6: sunrise 6:36 AM · sunset 7:28 PM
No dogs on part of this route · Transit-accessible: Bierstadt Bus Stop stop 9 m from the trailhead · Toilets at the trailhead · Parking lot at the trailhead
- Start on Bierstadt Moraine Trail, heading NW.
- 0.9 miContinue straight onto Bierstadt Lake Trail, heading NW.
- 0.1 miTurn left onto Bear Lake-Bierstadt Trail, heading SW.
- 1.3 miContinue straight onto Flattop Mountain Trail, heading SW.
- 3.7 miPass Flattop Mountain.
- 50 ftBear left, heading SW.
- 0.2 miPass Tyndall Glacier.
- 0.4 miBear right, heading E.
- 100 ftReach Hallett Peak, then turn around and head back the way you came.
- 150 ftBear left, heading SE.
- 4.3 miContinue straight onto Bear Lake-Bierstadt Trail, heading NE.
- 1.3 miTurn right onto Bierstadt Lake Trail, heading E.
- 0.1 miContinue straight onto Bierstadt Moraine Trail, heading SE.
- 0.9 miArrive 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 6.0 mi in (~250 min). Leave by 2:58 PM for the 7:28 PM sunset. Back at your car by 10:09 PM, after dark — bring a headlamp.
Good to know
- No dogs on part of this route
- Transit-accessible: Bierstadt Bus Stop stop 9 m from the trailhead
- Toilets at the trailhead
- Parking lot at the trailhead
More from Bierstadt Lake Trailhead Trailhead
- Boulder Brook Trail 4.7 mi · ▲ 1,529 ft
- Glacier Creek Trail 5.1 mi · ▲ 527 ft
- Lake Haiyaha–Dream Lake, 8 lakes 8.3 mi · ▲ 1,999 ft
- Dorsey Lake–Glacier Creek Stock Trail, 4 sights 9.3 mi · ▲ 1,219 ft
- Dream Lake–Bear Lake Loop, 8 sights 10.7 mi · ▲ 2,486 ft
- Andrews Glacier–The Loch, 7 sights 14.7 mi · ▲ 3,873 ft
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