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A challenging loop, technical in spots, but rewarding with valley views and countless alpine lakes.


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Map Key

22.2

Miles

35.8

KM

80%

Runnable

12,049' 3,673 m

High

9,684' 2,952 m

Low

4,972' 1,515 m

Up

4,962' 1,513 m

Down

8%

Avg Grade (5°)

44%

Max Grade (24°)

Dogs Leashed

Features Lake · Views · Wildflowers · Wildlife

Overview

This is a great long run that will give you outstanding views of the Fraser valley, an up close look at Devil's Thumb, and innumerable alpine lakes. There is some exposure on the way down from Caribou Pass Trail but nothing too bad! Even people afraid of heights will not have a problem.

Need to Know

Arapaho National Forest costs $5 per day. There is a pay station that accepts credit cards (?!) that you'll pass on your way to Meadow Creek Reservoir. You can also pay the volunteer at Junco Lake in cash; however, there are usually only volunteers on the weekends.

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.

Description

Begin at the Junco Lake Trailhead, in the Arapaho National Forest. Run on the Columbine Trail before arriving at the High Lonesome Trail about 0.25 miles from the Junco Lake Trailhead.

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.

Flora & Fauna

Lots of wildflowers in the summer!

History & Background

There is some cool mining equipment about halfway up the Arapaho Pass Trail!

Contacts

Shared By:

Michael Tevebaugh

Trail Ratings

  4.7 from 12 votes

#760

Overall
  4.7 from 12 votes
5 Star
67%
4 Star
33%
3 Star
0%
2 Star
0%
1 Star
0%
Recommended Route Rankings

#158

in Colorado

#760

Overall
27 Views Last Month
18,360 Since Aug 20, 2017
Intermediate/Difficult Intermediate/Difficult

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8%

Photos

Flowery meadows on a rainy day.
Aug 1, 2017 near Nederland, CO
Looking toward Devil's Thumb Peak, yeah!
Aug 25, 2015 near Fraser, CO
Summer flowers were crazy epic.
Jul 10, 2016 near Nederland, CO
Early morning on the Arapaho Pass trail.
Aug 16, 2023 near Nederland, CO
View from the top
Aug 23, 2019 near Fraser, CO
This panorama looks down to the valley/trailhead, and up toward Arapahoe Pass.
Jul 4, 2017 near Nederland, CO
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Weather


Current Trail Conditions

All Clear 63 days ago
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Check-Ins

Jul 15, 2024
Matthew Harms
Jul 8, 2022
Jake Marty
Started from 4th of July Trailhead. Conditions were beautiful, wildflowers are OUT. Snow wasn't too bad—some short, but exposed sections and glissa… 26mi — 6h 00m
Sep 13, 2020
Lee Cordova
Some snow, only tricky part was Caribou Pass. Tree blow down from Sept 2020 storm in trees W of divide; climb to Devils Thumb nearly impassible
Sep 13, 2019
Atsuko Ohtake
did this CCW starting at Devils Thumb trailhead. It was about 24 miles. Beautiful!
Aug 26, 2019
JonW
Started from Fourth of July TH. Linked up with High Lonesome Loop. 31.5mi
Jul 30, 2019
Atsuko Ohtake
Started at Devils Thumb Trailhead and went counter clockwise. few snow patches to cross, but was stopped by icy patch in couloir descending down to 4
Jul 28, 2019
Scott Coburn
22.2mi — 5h 30m
Aug 22, 2018
Michael Reschly
Small sketchy stretches between Arapahoe and Caribou passes, but nothing that bad. Several moose along the western-most portion of the loop.
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