Junco Lake Loop
ElevationAscent: 4,972' 1,515 m
Descent: -4,962' -1,513 m
High: 12,049' 3,673 m
Low: 9,684' 2,952 m
GradeAvg Grade: 8% (5°)
Max Grade: 44% (24°)
Popular runs nearby
26.5 mi 42.6 km • Point to Point • 6,632 ft Ascent 2021.41 m Ascent
Long Lake Loop
3.6 mi 5.8 km • Loop • 294 ft Ascent 89.63 m Ascent
Mitchell Lake Trail Out and Back
5.4 mi 8.7 km • Out and Back • 864 ft Ascent 263.28 m Ascent
7.7 mi 12.4 km • Out and Back • 2,662 ft Ascent 811.3 m Ascent
Brainard Lake Snowshoe Trail
4.8 mi 7.8 km • Loop • 468 ft Ascent 142.59 m Ascent
Hessie to Lost Lake
4.4 mi 7.1 km • Loop • 860 ft Ascent 262.21 m Ascent
Navigate on-trail with our free app
“A challenging loop, technical in spots, but rewarding with valley views and countless alpine lakes.”— Michael Tevebaugh
A CAMPING PERMIT is required between June 1st and September 15th; pass waived for wilderness overnight campers with Indian Peaks Pass. Many of the lakes close to the trail have designated campsites that you should try to use rather than making your own new campsite elsewhere.
High Lonesome will take you through forest and some small rolling hills; a great warm-up before the first big hill!
After 5-6 miles, you'll take a left to continue on High Lonesome (which is also the CDT) for a very steep climb over the next 2 to 3 miles.
Upon reaching Devil's Thumb, take the ridge on your right and look out for cairns. The trail should be obvious. You'll take this until reaching Devil's Thumb Trail #902, which will take you to the east side of the Continental Divide. Once on the east side, you'll head on a steep downhill past several alpine lakes.
Continue on Devil's Thumb Trail until reaching Diamond Lake Trail on your left. Diamond Lake will climb until eventually flattening out at Diamond Lake.
After you get to the lake, you'll head downhill, crossing several streams, until reaching the Arapaho Pass Trail on your left.
Arapahoe Pass is a steady but not-too-steep climb. At the top, you'll switch over to Caribou Pass Trail and have awesome views of the valley and alpine lakes below.
You'll continue on Caribou Pass Trail, all downhill, until you reach a junction with the Columbine Trail, and head back to the parking lot.
Run this trail?
We need help with the following missing trail information:
Is something wrong? Let us know. Have photos to share? Help fellow runners know what's here.
Land Manager: USFS - Boulder Ranger District Office