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Arapaho Glacier Trail



7.9 mile 12.8 kilometer point to point
77% Runnable


Ascent: 2,782' 848 m
Descent: -1,544' -471 m
High: 12,725' 3,878 m
Low: 9,992' 3,046 m


Avg Grade: 10% (6°)
Max Grade: 32% (18°)


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Trail shared by Tom Robson

An unmaintained, native surface trail with fantastic views of high peaks and stunning glaciers.

Tom Robson

Features Birding · Fall Colors · Lake · River/Creek · Views · Wildlife

Campfires are not permitted in this area of the Indian Peaks Wilderness. Permits are required for overnight stays from June 1st - September 15th.

Runner Notes

This is a fantastic high-alpine running experience.


The Arapaho Glacier Trail #905 leads northward from the main trailhead (located before entering the Rainbow Lakes Campground) and crosses into the Indian Peaks Wilderness. Climbing through the woods for about two miles, the trail exits onto the open tundra with a fine view into the City of Boulder Watershed. As posted, this area is private. Do not trespass.

After additional switchbacks, the Arapaho Glacier Trail crosses to the south side of the ridge. At the highest point on the trail is a spectacular overlook of the Arapaho Glacier, South Arapaho (13,397 feet), and North Arapaho (13,502 feet) Peaks.

Although no official trail exists, it is possible to ascend South and North Arapaho Peaks by following the ridge above the glacier. The climb to South Arapaho Peak is straightforward rock hopping. From South to North Arapaho Peak, scrambling is necessary. Technical equipment is not required but the narrow ridge is steep and rocky. Use caution.

The Arapaho Glacier Trail descends 1,300 feet down a series of switchbacks to intersect the Arapaho Pass Trail #904 at the Fourth of July Mine. Arapaho Pass is 1.2 miles farther west.

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Jul 12, 2019
Eric Forsyth
Jul 15, 2018
Michael Reschly
13.6mi — 4h 45m
Jul 7, 2018
Katie Mika
Great run with adding South Arapaho peak - terrific views! 13.2mi — 5h 00m
Aug 18, 2017
Whitney R
Jul 1, 2017
Andrew Sharpe
Jun 23, 2017
Jen McMurtrey

Trail Ratings

  4.8 from 16 votes


in Nederland


  4.8 from 16 votes
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in Nederland


in Colorado


114 Views Last Month
20,994 Since Apr 7, 2015



Epic summer flowers.
Jul 10, 2016 near Nederland, CO
Triple Lakes sits below Arapaho Glacier, Mount Albion, and North Arapaho Peak.
Jul 9, 2017 near Nederland, CO
The summer flowers were crazy epic!
Jul 10, 2016 near Nederland, CO
The summer flowers were crazy epic.
Jul 10, 2016 near Nederland, CO
This panorama looks down to the valley/trailhead, and up toward Arapahoe Pass.
Jul 4, 2017 near Nederland, CO
Arapahoe Glacier is simply stunning.
Jul 4, 2017 near Nederland, CO


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