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Colorado Trail: Kenosha Pass to Lost Creek Wilderness Boundary

 18 votes


14.4 Miles 23.2 Kilometers




1,873' 571 m


-1,873' -571 m



Avg Grade (3°)


Max Grade (10°)

10,419' 3,176 m


9,522' 2,902 m




Getting forecast...

Well balanced singletrack with impressive views of endless aspen groves

Chuck McQuade


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.
Dogs: Off-leash

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


Dec 17, 2017
Travis Leonard
perfectly fat-tastic. 4 inches of snow. 7mi
Nov 12, 2017
Shannon Griswold
Oct 8, 2017
Patrick Burns
Way rockier than the rating suggests with some downright rowdy loose chunk here and there. There are two primo DH Aspen tunnels; one narrow and in...
Sep 13, 2017
Lara Nguyen
Foliage is almost there! 13.6mi
Sep 4, 2017
Rich Purdy
Sep 4, 2017
Katie Purdy
Aug 20, 2017
Eugenio Pérez Quijada
Aug 9, 2017
Charlie Gavin
Trail was great, need to do the whole thing. Bottom was really fun in the Aspen! 10mi

Trail Ratings

  3.8 from 18 votes


in Park County


  3.8 from 18 votes
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in Park County


in Colorado


149 Views Last Month
14,227 Since Apr 7, 2013
Intermediate Intermediate


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
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

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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