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Colorado Trail: Kenosha Pass to Lost Creek Wilderness Boundary

 3.7 (23)
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Map Key

13.1 Miles 21.1 Kilometers



1,690' 515 m


-1,689' -515 m



Avg Grade (3°)


Max Grade (10°)

10,418' 3,175 m


9,525' 2,903 m


Shared By Chuck McQuade



Getting forecast...

Well balanced singletrack with impressive views of endless aspen groves

Chuck McQuade

Dogs Off-leash

Features -none-

Lost Creek Wilderness Boundary (No Bikes) is encountered 7 miles in from the Kenosha Pass parking lot.


This is a great, usually overlooked ride. It provides an alternative to its more famous counterpart across the highway (Kenosha Pass to Georgia Pass and West Jefferson).

There are a couple of tough climbs, but overall this ride is a great ride for the more novice mountain biker, and much easier than its counterpart across the pass. This ride contains great flow sections within aspen tunnels, a couple of great rock gardens and incredible views! The scenery is fantastic, especially during the fall season, as the area is smothered with aspen groves.

This is the tail end of Segment #5 of the Colorado Trail (Denver to Durango Direction) The majority of Segment #5 is in legal Wilderness (No Bikes), however the section that isn't provides an excellent out and back.

Need to Know

The Kenosha Pass area is definitely not a secret. During the peak aspen gazing season especially on weekends, both parking lots can be full and trying to rip along this trail can be more work than fun when it's busy.


The smooth singletrack begins near the East Kenosha Pass parking lot. If the parking lot is full, one can park on either side of the road at the Kenosha Pass parking lot.

Enjoy the fast flowing singletrack for the first few miles through aspen tunnels and alpine meadows. Don't go too fast or you'll miss the vast views of the South Park basin off to the west. A little over two miles in you'll get several miles of fast downhill. There's a bridge to cross over Johnson Creek before a slight climb which precedes another downhill section leading to the Wilderness Boundary.

At this point bikes are not permitted so turn around and enjoy the ride back. The return will indeed be more of a climb back to the pass, but this only means more time to savor the views.


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Your Check-Ins


Oct 14, 2018
Anna Gasiewicz
Really scenic. Has a few nice climbing sections 13mi — 2h 30m
Sep 21, 2018
Neil Hanson
We rode the first 3.5 miles. Stellar views! We talked about making a full day next time and going all the way down to lost creek.
Sep 20, 2018
Jerry Weiss
Sep 18, 2018
Sandra G
Sep 16, 2018
Clark Sperry
Perfect Aspens. 13.1mi
Sep 15, 2018
Jim Forrester
Sep 13, 2018
Becky Yoder
Too late e in the day to do the full put and back. I like my section of babyhead rocks - so if you can’t ride those, there will a lot of hike a bik… 8mi
Sep 12, 2018
Trent R

Trail Ratings

  3.7 from 23 votes


in Park County


  3.7 from 23 votes
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in Colorado


49 Views Last Month
17,615 Since Apr 7, 2013
Intermediate Intermediate

Anonymous User
Anonymous User  
When you get to mile 6 (Rock Creek Rd - shown as 133 on map), turn right & follow the dirt road down to Lost Park Rd (56 on map). Follow that for 3.6 miles to Long Gulch (817 on map). H-a-B up the switchbacks & that'll put you at the top of the N Fork of Lost Creek. Follow singletrack down to campground, and N Fork TH (wilderness boundary). May 5, 2014
Jake Barney
Denver, CO
Jake Barney   Denver, CO
Road this earlier today -- worth it for more than the scenery. Surprising amount of fun technical sections for the intermediate rider. A couple of longer, looser, rock gardens require not just technique but endurance to clean in both directions. The climbs don't look too rough on paper but felt tough at altitude. Areas of loss rocks, roots, sand, trees, a good bit of everything. Jul 20, 2014
Anonymous User
Anonymous User  
If you have a bike and going over the pass it is essential to stop for this easy out and back. Exercise time management as you go downhill most of the way out and uphill back, so don't want to get stuck in afternoon rains. At the end consider turning around in the valley at the creek crossing if you are not interested in the last little UP section. Lots of eye candy views. YIELD to the CT hikers of course. Jul 29, 2014

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