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Dirty Copper Triangle

 4.2 (23)
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32.3 Miles 52.0 Kilometers



5,379' 1,639 m


-5,366' -1,635 m



Avg Grade (4°)


Max Grade (15°)

12,260' 3,737 m


9,251' 2,820 m


Shared By D L



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Dirt version of the Copper Triangle


Dogs Unknown

Features -none-


Similar to the road version, the Dirty Copper Triangle (aka Copper Three Pass) traverses three high alpine passes: Searl Pass and Kokomo Pass along the Colorado Trail, and Ptarmigan Pass along Resolution Road above Camp Hale. The ride incorporates the Colorado Trail: Copper Mountain to Camp Hale, Resolution Mountain Road #702, Wilder Gulch Trail, Wilder Gulch Connector, and the Vail Pass to Copper Bike Path in an epic loop ride.

The Latitude 40, Vail and Eagle, Recreational Topo Map is a great resource for this ride as it covers the entire route. The ride spans two Ranger Districts: Holy Cross and Dillon within the White River National Forest. Free maps are available at WRNF offices.

Need to Know

Each of the three passes tops out around 12,000 feet. That means very thin air. Even for acclimatized riders, this can result in a significant reduction in handling skills. Riders not accustomed to high altitude should be attentive to their bodies and be ready to abandon at the onset of altitude sickness.

The Colorado Trail: Copper Mountain to Camp Hale is an awesome, unique ride; however the last mile to Camp Hale is loose, and quite steep.

Resolution Mountain Rd. is a popular 4WD road, with lots of traffic. Couple this with a brutal 5.5 mile climb averaging over 10% grade for the top 2.5 miles, and the final 1.5 miles at nearly 14% can make this final climb frustrating.

The final 3.5 miles, and 600' of descent utilizes paved bike path, which can feel discouraging after the effort put in to get there. Alternatively, extremely adventurous riders may choose to descend the Wearyman Road #747.1 (read the details first!) and then climb up the vehicle road at the bottom.


Drive to the west end of Copper Mountain passing through a roundabout and park at the small parking lot on the right side of the road near the eastern end of the Vail Pass bike path. Ride back through, and south out of the roundabout towards the ski area on Copper Circle. Climb the access road south of the American Eagle chairlift to the first switchback, and the Colorado Trail intersection. The CT follows the access road west through this intersection. At the next switchback and road junction, exit the road onto a singletrack to the west.

The CT throughout Colorado is well marked. Copper Mountain is no different. The CT winds for about 1 1/4mi through Copper Mountain before exiting the ski area, passing through a forested area. The trail descends briefly, crossing Guller Creek, then climbs roughly parallel to the creek for 2 3/4mi. From here the CT switches back to the north and begins to climb above Janet's Cabin. After 1/4mi and another switchback the CT clears timberline. From this point to a mile below Kokomo Pass, the ride stays above timberline; which means exposure.

Continue south for another 1 1/4 over a mostly rideable section of trail to Searl Pass. At the pass enjoy the views, a snack, and a well-deserved break. This is also a good point to turn around if weather conditions, or physical fitness are questionable; bearing in mind that the ride back to Copper Mountain is 7 miles and incorporates a short climb back into the ski area boundary.

The CT between Searl and Kokomo Passes is a very unique, timberline traverse, punctuated with short, stinger climbs. The ride high point is 1/2 mile east of Kokomo Pass. Again, offering stunning views to the south and Climax Mine; and a second opportunity to assess conditions and fitness. This is the ride commitment point.

Descend 1/2 mile to Kokomo Pass, and continue a blistering 5 mile descent to Camp Hale. There are absolutely stunning views to the west of the Holy Cross Ridgeline including Mountain of the Holy Cross in the first mile below Kokomo Pass.

3.5 miles below Kokomo Pass, cross Cataract Creek. Below this crossing the trail becomes pretty steep and loose, so get that butt behind the saddle. A mile below the creek crossing bottom out at the southeastern corner of Camp Hale on road 714, East Fork Eagle Road. Go right on the road, then turn right back onto the CT singletrack. The CT parallels 714 for 2/3 mile before dropping back down to the road. This is where the ride deviates from the CT and is also the ride midpoint.

Follow 714 along the eastern edge of Camp Hale, passing 755, Ranch Creek Road on the right after 1/2 mile, as well as numerous roads to the left comprising the grid of roads that was Camp Hale. After 2 1/4 miles intersect Resolution Mountain Road #702 at a well-defined intersection. Turn right and begin the final climb of the day. Be prepared to share the road with numerous off-road vehicles as you climb.

There are three distinct road intersections along this climb: the first near the bottom with 708, McAllister Gulch Road on the left; the second 715, Pearl Creek Road on the right at 1 1/2 miles; and the last 751, Ptarmigan Road above timberline on the left, 1/2 mile from the summit of Ptarmigan Pass.

Top out at Ptarmigan Pass, and exalt in the fact that you've made it to the top and the remainder of the ride is downhill. Finding Wilder Gulch Trail from Ptarmigan Pass is the only real wayfinding along this ride. Wilder Gulch Trail is 3/4 miles from the summit of the pass, on the right side of the road in a sweeping left turn. The trail begins in a meadow, over timbers that have been piled to prevent motorcycles entering the trail.

Wilder Gulch Trail does not receive heavy traffic, giving it a primitive feel. Descend 2 1/4 miles in the meadow along Wilder Gulch to an intersection with Wilder Gulch Connector. Turn right and descend to Vail Pass to Copper Bike Path. Turn right and coast down to the parking lot. Drink beer!

History & Background

From Wikipedia:…

Camp Hale, between Red Cliff and Leadville in the Eagle River valley in Colorado, was a U.S. Army training facility constructed in 1942 for what became the 10th Mountain Division. It was named for General Irving Hale.

Soldiers were trained in mountain climbing, Alpine and Nordic skiing, cold-weather survival as well as various weapons and ordnance. When it was in full operation, approximately 15,000 soldiers were housed there.

The creation of an elite ski corps was a national effort, with assistance from the National Association of Ski Patrol, local ski clubs, and Hollywood. Enough men were recruited to create three army regiments, which were deployed after training. Camp Hale was decommissioned in November 1945.


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Your Check-Ins


Sep 20, 2018
Trapper Steinle
Let’s do this!
Aug 4, 2018
Chris Baker
Jul 31, 2018
Andrew Rapp
33mi — 4h 25m
Sep 3, 2017
Fritz Ritter
To much fun. 32mi
Aug 13, 2017
Kevin Krajewski
Jul 30, 2017
Peter Ericson
Jul 26, 2017
CJ O'Reilly
Sep 10, 2016
Albert Comeaux
it was chill

Trail Ratings

  4.2 from 23 votes


  4.2 from 23 votes
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The Colorado Trail from Copper to Kokomo Pass is unreal! Easy to navigate with the only challenge being finding Wilder Gulch, which has a trailhead marker with a number but no name. As the directions indicate this is 3/4 miles from the top of the pass. If you miss this you are in for a long haul back to Copper. Aug 1, 2018
The ct trail section of this is just fantastic. The last half of the climb up ptarmigan is grueling - was whooped and did some pushing. Someone mentioned running it backwards. It would be a shame to waste that all that altitude on fireroad down from ptarmigan. Then the climb up the ct would be really steep and loose for 1/3 of the altitude - tho you would then get a pretty sweet descent into copper from the top. The wilder gulch turn is now clearly marked with its # which is 75 and its name. However, I did miss the connector off of wilder gulch. Aug 20, 2018
Having just done this with a group of experienced riders/racers, I thought I'd add some info as the description (though long) misses a few details. 1. This isn't a ride for novices. Our crew was composed of experience riders and racers and... it took us around 5 hours of moving time. 2. Opinions vary, but I don't think it's a "Black Diamond" in terms of technical features, by any stretch. Elements of the climb up to Kokomo might be more challenging for some (and everything gets a little harder when you haven't been riding at 12k much this season). 3. The best part is the descent down to Camp Hale, by far. 4. Water is an issue. We underestimated the time it would take and didn't exactly hammer the brutal climb up Resolution Road. We were basically out of fluids. In hindsight, this would be a perfect ride to bring some kind of lightweight filtration system. There is plenty of water around, but no one wants to get Giardia. 5. Resolution road is nasty. It's not rough, in fact it's definitely one of the more tame Jeep roads I've encountered, but it is unrelenting in steepness and the gravel is loose enough that if you lose traction: game over. It's a good place to rock Eagle, something I never thought I would say. 6. Best to do this in early fall. You are climbing up the "A-Road" trail for a bit and might encounter some downhill traffic. Plus, fall foliage. 7. The CT segment might be one of the best ones. I can see why folks do that part as an out and back. You miss that descent to Hale, but don't have to climb Resolution Road. 8. Wilder Gulch is low on traffic and maintenance. It's pretty over grown and you'll definitely feel like you're poaching vs riding proper single track. I'd call this route more of a "once a year/once period" kind of jawn. I love tough rides, but even I was surprised at how spent I was when we hit Resolution. It's fun, it's hard. I've done 80 mile MTB races that felt easier (or I was faster/stronger), honestly. But if none of this scares you: it's decently epic. Sep 10, 2018

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