Rocky Mountain National Park

Flattop Mountain–Ptarmigan Glacier, 6 sights

9.7 mi · ▲ 3,038 ft · 4 hr 45 min

Flattop Mountain–Ptarmigan Glacier, 6 sights is a 9.7-mile out-and-back in Rocky Mountain National Park near Beaver Point, CO. The route passes Bear Lake and Flattop Mountain before reaching Ptarmigan Glacier at the turnaround, 4.9 miles in. It climbs 3,038 ft, with sections as steep as 18% grade, and is mostly dirt. It scores 49/100 on the Ambleway Wildness scale: green fringe.

Elevation

0 mi9,433 – 12,320 ft · steepest grade: 18%10.0 mi

Getting there

Trailhead: Bear Lake Road 40.31183, -105.64262
Nearest town Beaver Point, CO

Directions

AMBLEWAYwww.ambleway.com

Flattop Mountain–Ptarmigan Glacier, 6 sights

9.7 mi · ▲ 3,038 ft · 4 hr 45 min

Elevation 9,433–12,319 ft

Out & Back · Rocky Mountain National Park

Trailhead: Bear Lake Road · 40.31183, -105.64262

Weather Sep 5: Light drizzle, high 70°F / low 55° · precip 3% · wind 12 mph · sunrise 6:35 AM · sunset 7:30 PM

No dogs on part of this route · Transit-accessible: Glacier Gorge stop 257 m from the trailhead · Toilets at the trailhead · Parking lot at the trailhead

  1. Start on Bear Lake Stock Trail, heading N.
  2. 0.2 miPass Bear Lake.
  3. 150 ftContinue straight onto Bear Lake Trail, heading N.
  4. 150 ftBear left onto Bear Lake-Bierstadt Trail, heading N.
  5. 0.3 miSharp left onto Flattop Mountain Trail, heading NE.
  6. 3.7 miPass Flattop Mountain.
  7. 0.3 miBear right onto Tonahutu Creek Trail, heading SW.
  8. 0.3 miPass Ptarmigan Glacier.
  9. 150 ftReach Flattop Mountain, then turn around and head back the way you came.
  10. 50 ftBear right, heading NW.
  11. 0.3 miBear left onto Flattop Mountain Trail, heading E.
  12. 4 miSharp right onto Bear Lake-Bierstadt Trail, heading NE.
  13. 0.3 miBear right onto Bear Lake Trail, heading SW.
  14. 150 ftContinue straight onto Bear Lake Stock Trail, heading SW.
  15. 0.2 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

94% dirt6% unspecified

Weather

Light drizzleTemperature 70°F55°
Precip3%Wind12 mphUV7Humidity35%
Rained 0.3″ 5 days ago
Hourly temperature
70°55°
Sunrise 6:35 AM12 AM3 AM9 AM12 PM3 PMSunset 7:30 PM
Sun 71°53° 25%
Mon 68°50° 16%
Tue 72°46° 18%
Wed 74°50° 33%
Thu 68°50° 32%
Fri 72°46° 26%

Sunset

The best sunset spot on this hike is 4.2 mi in (~188 min). Leave by 4:02 PM for the 7:30 PM sunset. Back at your car by 9:26 PM, after dark — bring a headlamp.

More sunset hikes nearby

Good to know

  • No dogs on part of this route
  • Transit-accessible: Glacier Gorge stop 257 m from the trailhead
  • Toilets at the trailhead
  • Parking lot at the trailhead

More from Bear Lake Road Trailhead