Events
Race Directors

50 KM Ultra Running Events in Colorado

All 50 KM 50 Miles 100 KM 100 Miles 6 Hours 12 Hours 24 Hours

Upcoming Events

Date Event City Distances
07/25/26 Pikes Peak Ultra Colorado Springs 50 KM , 50 Miles
08/01/26 Sheep Mountain Trail Runs Fairplay 50 KM , 50 Miles
08/01/26 Winter Park 50K Winter Park 50 KM
08/01/26 Aspen Backcountry Marathons Aspen 14.6 Miles , 26.2 Miles , 50 KM
08/15/26 Roxborough Ultras Littleton 50 KM , 50 Miles
08/15/26 Westminster Trail Race Westminster 50 KM
08/29/26 Continental Divide Trail Run Steamboat Springs 50 KM
08/29/26 Rock Hawk Castle Rock 50 KM
09/03/26 Front Range Ultra Dayze Loveland 12 Hours , 24 Hours , 48 Hours , 100 Hours , 50 KM , 100 Miles , 200 Miles
09/05/26 Creede Mountain Run Creede 50 KM
09/12/26 Devil on the Divide 50K Empire 50 KM
09/12/26 Snow Mountain Ranch Granby 50 KM
09/26/26 WILD Wahatoya Runs La Veta 50 KM
09/26/26 Sangre de Cristo Trail Festival Westcliffe 50 KM , 50 Miles , 100 KM , 101.3 Miles
09/26/26 Red Feather Trail Jamboree Red Feather Lakes 50 KM , 50 Miles
09/26/26 West Line Winder Buena Vista 50 KM
09/27/26 Estes Epic Estes Park 50 KM
09/27/26 Sawatch Ascent Nathrop 50 KM
10/03/26 Sage Burner 50k Gunnison 50 KM
10/03/26 The Bear Chase Lakewood 50 KM , 50 Miles , 100 KM
10/03/26 Above the Clouds Ultra Woodland Park 50 KM
10/03/26 Castle Rock Trail Festival Castle Rock 50 KM
10/10/26 Suffer Better Fall Trail Run Pine 50 KM
10/17/26 Bobcat Trail Races Colorado Springs 50 KM
10/24/26 Bridge Burner Ultra Canon City 50 KM , 35 Miles
11/07/26 Kessel Run Ultra Fruita 50 KM , 40 Miles , 50 Miles
11/21/26 Colorado Cold Rush Ultra Colorado Springs 50 KM
12/05/26 Sawmill Trail Runs Pine 50 KM
04/09/27 Desert Rats Trail Running Festival Fruita 50 KM , 100 KM
04/17/27 Rattler Trail Race Colorado Springs 50 KM
04/24/27 Cheyenne Mountain Trail Race Colorado Spring 50 KM
05/01/27 Greenland Trail Races Larkspur 50 KM
05/08/27 Valkyrie Trail Race Colorado Springs 50 KM
06/05/27 Weld Your Mettle Running Festival Windsor 36 Hours , 50 KM , 50 Miles , 100 KM , 100 Miles
06/12/27 Summits Trail Runs Granby 14 Hours , 27.8 Miles , 50 KM

Past Events

Date Event City Distances
07/18/26 Silverton Alpine Silverton 50 KM
07/18/26 Power of Four Trail Run Aspen 50 KM
06/27/26 John Cappis 50K Fat Ass Silverton 19 Hours , 50 KM
06/27/26 Chase the Moon Endurance Run Highlands Ranch 6 Hours , 12 Hours , 50 KM
06/20/26 Ring the Springs Colorado Springs 50 KM , 50 KM , 50 Miles , 100 KM , 100 Miles
06/13/26 Barr Lake Brighton 50 KM
06/07/26 The Great Divide Ultra Divide 50 KM , 100 KM , 100 Miles
06/06/26 Haul Ass Ultra Running Festival Erie 6 Hours , 9 Hours , 12 Hours , 50 KM , 50 Miles
05/30/26 North Fork 50 Mile/50K Pine 50 KM , 50 Miles
05/16/26 Ram Party Colorado Springs 29.4 Miles , 50 KM , 60 KM , 50 Miles , 50 Miles , 55 Miles
05/02/26 Colorado Brewery Running Series - Denver Beer Company 50K Arvada 50 KM
04/25/26 Royal Gorge Groove Cañon City 50 KM , 55 KM , 60 KM
04/25/26 Runs With Scissors Races - CO Brighton 50 KM
10/18/25 Rabbit Valley Ultras Mack 50 KM , 100 KM
10/04/25 Taco Bell 50K Denver 50 KM
10/04/25 Hanging Flume 50k Uravan 50 KM
11/27/24 Mountain Peacock 50k Golden 50 KM
09/21/24 Silver Creek Mountain Runs (Divide 100) Georgetown 50 KM , 50 Miles , 100 KM , 100 Miles
06/29/24 Methodist Mountain Ultra Salida 50 KM
03/11/23 Cuchara Snowshoe Races La Veta 50 KM
10/08/22 Rough Canyon Trail Runs Grand Junction 50 KM , 50 Miles
09/25/22 Pikes Peak APEX Colorado Springs 50 KM
09/17/22 Tava's Shadow Ultra Divide 50 KM , 100 KM
07/30/22 Ole School 50/50 Steamboat Springs 50 KM , 50 Miles
06/04/22 Durango Skyline Trail Runs Durango 50 KM , 50 Miles
06/03/22 Golden Gate Dirty 30 Black Hawk 50 KM
10/03/21 Rad Dirt Fest Trinidad 50 KM
09/05/21 Breck Crest Breckenridge 50 KM
07/17/21 Kickers For Kids Fun Run Palmer Lake 50 KM , 50 Miles , 100 KM , 100 Miles
10/03/20 Tommyknocker 12-Hour & Mine Shaft Half Golden 12 Hours , 50 KM , 100 KM
05/02/20 Cheyenne Mountain Ultra 10x5k Colorado Springs 50 KM
09/22/19 Sunset Trail Running Festival Gold Hill 50 KM
08/25/18 Devil Mountain Pagosa Springs 50 KM , 50 Miles
07/14/18 Under Armour Mountain Running Series - Copper Mountain Copper Mountain 50 KM
09/02/17 Hideaway Hundred Winter Park 50 KM , 50 Miles , 100 KM , 100 Miles
05/07/17 Cimarron Endurance Run Cimarron 50 KM
04/29/17 The Chatfield Ultra Race - C.U.R.E ultras Littleton 50 KM , 50 Miles , 100 KM
10/11/14 24 Hours of Boulder Boulder 6 Hours , 12 Hours , 24 Hours , 50 KM , 100 KM , 100 Miles
09/06/14 Ultra Race of Champions (UROC) - CO Vail 50 KM , 100 KM
07/26/14 Mt. Werner Classic Steamboat Springs 50 KM
10/12/13 Durango Double 50k Durango 50 KM
06/01/13 Run for Aurora Roxborough 50 KM , 50 Miles
10/03/09 Blue Sky Trail Marathon Fort Collins 50 KM
07/26/08 High Mountain Leadville 50 KM
10/09/04 Telegraph Trail Durango 50 KM
05/25/02 Black Canyon Montrose 50 KM
04/07/01 Mile High Metric Challenge Littleton 50 KM

Weekly Newsletter

A roundup of the week's content and most recent race results. Sent once a week on Thursday.

Recent Results

Silverheels Trail Runs
Fairplay, CO - 52 finishers
60 KM
Devil's Gulch
Wenatchee, WA - 82 finishers
100 Miles | 50 Miles
Thumbs Up Summer Slam
Estes Park, CO - 0 finishers
12 Hours
Dances with Dirt - Devil's Lake
Baraboo, WI - 166 finishers
50 Miles | 50 KM
Carolina Reaper Challenge
Greenville, SC - 80 finishers
50 KM
Eastern Legend
Gilmer, TX - 5 finishers
50 KM
First Blaze Trail Race
Milton, ON - 70 finishers
50 KM
Spaulding Woods 50K
Northfield, NH - 52 finishers
50 KM
Kaslo Wild Ultra
Kaslo, BC - 52 finishers
52 KM
Get Your Butt Kicked @ Route 66
Eureka, MO - 37 finishers
6 Hours
View All Results