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Tunnel Lake Trail

Difficult

Trail

7.5 mile 12.1 kilometer point to point
Singletrack
Difficult

Elevation

Ascent: 1,279' 390 m
Descent: -1,312' -400 m
High: 12,295' 3,747 m
Low: 11,082' 3,378 m

Grade

Avg Grade: 7% (4°)
Max Grade: 20% (11°)

Dogs

Unknown
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Map Key

Trail shared by Adam Kagy

High alpine singletrack that is almost entirely above treeline.

Adam Kagy

Electric Mountain Bikes Unknown

Features -none-

Description

The Tunnel Lake Trail is high alpine singletrack accessed from just outside of the ghost town of St. Elmo or from FS 839 Alpine Tunnel 4x4 Road near the top. Technically this is part of the CDT (Continental Divide Trail), but this segment in particular has its own name.

The views are fantastic along this primitive trail as it meanders through the high alpine tundra ending in a fast flowy switchback descent.

The trail is very rocky at times above tree line with a few sections of hike-a-bike unless you're a very strong rider in terms of leg strength and lung strength. The descent and switchbacks through the dark timber near the ending has a very well maintained and non-technical nature.

Biked this trail?

We need help with the following missing trail information:

Family Friendly, ADA Accessible, Need to Know, Dogs Allowed, Features, Electic Mountain Bikes Allowed

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Trail Ratings

  4.7 from 6 votes

#1

in Hancock

#4154

Overall
  4.7 from 6 votes
5 Star
83%
4 Star
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3 Star
17%
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Trail Rankings

#1

in Hancock

#326

in Colorado

#4,154

Overall
7 Views Last Month
1,866 Since Oct 9, 2014
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Photos

Buff and scenic. The Alpine Tunnel Trail is great.
Jul 16, 2018 near St. Elmo, CO
Fall time at Tunnel Lake.
Sep 19, 2015 near Buena V…, CO
Fall time at Tunnel Lake
Sep 19, 2015 near Buena V…, CO
Quick 100yrd hike a bike from the CDT and Alpine Tunnel junction
Sep 19, 2014 near Buena V…, CO
Reaching the saddle
Sep 19, 2014 near Buena V…, CO
High above- on the CDT Alpine Tunnel trail
Sep 19, 2014 near Buena V…, CO

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