Events
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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
01/18/25 Resolve to Run 5K & Ultra Challenge Greeley 12 Hours
02/15/25 Stories Trail Runs Colorado Springs 6 Hours , 15 Hours , 30 Hours
02/15/25 Running Up for Air - Staunton Rocks Pine 6 Hours , 12 Hours , 24 Hours
04/05/25 Run the Ranch Loveland 6 Hours , 12 Hours
04/11/25 Desert Rats Trail Running Festival Fruita 50 KM , 100 KM
04/19/25 Rock Hawk Castle Rock 50 KM
04/19/25 Rattler Trail Race Colorado Springs 50 KM
04/26/25 Runs With Scissors Races - CO Brighton 50 KM
04/26/25 Royal Gorge Groove Cañon City 50 KM
04/26/25 Cheyenne Mountain Trail Race Colorado Spring 50 KM
05/03/25 Collegiate Peaks Trail Run Buena Vista 50 Miles
05/03/25 Falcon 50 Colorado Springs 50 Miles
05/03/25 Greenland Trail Races Larkspur 50 KM
05/10/25 Valkyrie Trail Race Colorado Springs 50 KM
05/10/25 Quad Rock 50 Fort Collins 50 Miles
05/17/25 Sky Pilots Ouray Backyard Ultra Ouray Backyard
05/17/25 Ram Party Colorado Springs 50 KM , 60 KM , 55 Miles
05/17/25 Samson's Revenge Estes Park 55 KM
05/17/25 Endure Trail Runs Divide 12 Hours , 24 Hours
05/24/25 The Ol' College Try 24 Hour Ultra Denver 6 Hours , 12 Hours , 24 Hours
05/24/25 Weld Your Mettle Ultra Marathon Windsor 6 Hours , 9 Hours , 12 Hours , 24 Hours
05/31/25 North Fork 50 Mile/50K Pine 50 KM , 50 Miles
06/07/25 Mace’s Hideout 100 Beulah 50 Miles , 100 Miles
06/07/25 The Great Divide Ultra Divide 50 KM , 50 KM , 100 KM , 100 Miles
06/07/25 Broken Brain Backyard Craig Backyard
06/14/25 Barr Lake Brighton 50 KM
06/14/25 Summits Trail Runs Granby 27 Miles , 43 Miles
06/21/25 San Juan Solstice Lake City 50 Miles
06/21/25 Ring the Springs Colorado Springs 50 KM , 100 KM
06/28/25 John Cappis 50K Fat Ass Silverton 19 Hours , 50 KM
07/11/25 Hardrock 100 Endurance Run Silverton 100 Miles
07/11/25 Silverheels Trail Runs Fairplay 60 KM , 50 Miles , 100 KM , 100 Miles
07/11/25 Chase the Moon Endurance Run Highlands Ranch 12 Hours , 50 KM
07/12/25 Silver Rush 50 Leadville 50 Miles
07/18/25 High Lonesome 100 Salida 100 Miles
07/18/25 Ouray 100 Mile Endurance Run Ouray 100 Miles
07/19/25 Powderhorn Mountain Ultra and Vert Challenge Mesa 6 Hours , 12 Hours
07/19/25 Silverton Alpine Silverton 50 KM
07/19/25 Power of Four Trail Run Aspen 50 KM
07/25/25 Never Summer 100K Gould 60 KM , 100 KM
07/26/25 Grand Mesa Ultras Grand Mesa 55 KM , 50 Miles
07/26/25 Pikes Peak Ultra Colorado Springs 50 KM , 50 Miles
07/26/25 Creede 100 Creede 100 Miles
07/28/25 The Summit 200 Frisco 200 Miles
08/02/25 Sheep Mountain Trail Runs Fairplay 50 KM , 50 Miles
08/08/25 HighFive100 Lake City 100 Miles
08/15/25 San Juan Softie 100 Durango 100 Miles
08/16/25 Leadville Trail Leadville 100 Miles
08/22/25 NoCo Urban Ultra and Relay Greeley 50 Miles , 100 Miles
08/23/25 Telluride Mountain Run Telluride 40 Miles
08/23/25 Rio Grande 100 South Fork 100 Miles
08/23/25 Westminster Night Trail Westminster 50 KM
08/23/25 Continental Divide Trail Run Steamboat Springs 50 KM
08/28/25 Front Range Ultra Dayze Loveland 12 Hours , 24 Hours , 48 Hours , 72 Hours , 100 Hours , 100 Miles , 200 Miles
08/30/25 Creede Mountain Run Creede 50 KM
08/30/25 Grand Traverse Mountain Run Crested Butte 40 Miles
09/05/25 American Heroes Run Longmont 9 Hours , 24 Hours , 100 Miles
09/06/25 Devil on the Divide 50K Empire 50 KM
09/12/25 Run Rabbit Run Steamboat Springs 50 Miles , 100 Miles , 100 Miles
09/13/25 Snow Mountain Ranch Trail Running Festival Granby 50 KM
09/26/25 Red Feather Trail Jamboree Red Feather Lakes 50 KM , 50 Miles
09/27/25 24 Hours of Palmer Lake Palmer Lake 24 Hours
09/27/25 Crested Butte Ultra Crested Butte 55 KM , 50 Miles
09/27/25 Sangre de Cristo Trail Festival Westcliffe 50 KM , 50 Miles , 100 KM , 100 Miles
09/27/25 The Bear Chase Lakewood 50 KM , 50 Miles , 100 KM
09/27/25 West Line Winder Buena Vista 50 KM
09/28/25 Sawatch Ascent Nathrop 50 KM
10/04/25 Rocky's Backyard Ultra Race Estes Park Backyard
10/04/25 Castle Rock Trail Festival Castle Rock 50 KM
10/04/25 Hanging Flume 50k Uravan 50 KM
10/11/25 Sage Burner 50k Gunnison 50 KM
10/18/25 Indian Creek Trail Runs Sedalia 55 KM , 50 Miles
10/18/25 Bobcat Trail Races Colorado Springs 50 KM
11/01/25 Colorado 24 Hour Run Fort Collins 6 Hours , 12 Hours , 24 Hours
11/08/25 Kessel Run Ultra Fruita 60 KM , 50 Miles
12/06/25 Sawmill Trail Runs Pine 50 KM

Past Events

Date Event City Distances
12/07/24 Thumbs Up Vertical Challenge Estes Park 8 Hours
11/30/24 Colorado Cold Rush Ultra Colorado Springs 50 KM
11/27/24 Mountain Peacock 50k Golden 50 KM
11/16/24 BINGO! Trail Runs Byers Backyard
11/02/24 Bridge Burner Ultra Canon City 50 KM , 35 Miles
10/05/24 Suffer Better Fall Trail Run Pine 50 KM
10/05/24 Above the Clouds Ultra Woodland Park 50 KM
09/21/24 Silver Creek Mountain Runs (Divide 100) Georgetown 50 KM , 50 Miles , 100 KM , 100 Miles
09/14/24 Ouray 50 Mile Endurance Run Ouray 50 Miles
08/09/24 Jess' Backyard Ultra Greeley Backyard
06/29/24 Methodist Mountain Ultra Salida 50 KM
06/16/24 Desert Rats Kokopelli Stage Race Fruita 150 Miles
06/15/24 The Crooked Mile - State 48 LMS Canon City Backyard
06/15/24 Madness on the Mountain BYU Canon City Backyard
06/15/24 Cuchara Trail Runs La Veta 55 KM , 60 KM , 50 Miles , 55 Miles
06/01/24 Latino Ultra Nature Adventure Boulder 55 KM
10/07/23 The Crooked Mile - The Satsang LMS Canon City Backyard
09/16/23 Mountain Rats Festival Eagle 55 KM
09/02/23 The Crooked Mile - The Road Not Taken LMS Canon City Backyard
07/09/23 Last Call Fifties Fairplay 55 KM , 53.5 Miles
07/01/23 The Crooked Mile - The Sundance LMS Canon City Backyard
06/03/23 South Park Trail Runs Fairplay 24 Miles , 28 Miles , 38 Miles
05/20/23 Tava Canons Colorado Springs 50 Miles
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
06/18/22 Aspen Loop Ultra Mancos 40 Miles
06/04/22 Durango Skyline Trail Runs Durango 50 KM , 50 Miles
06/03/22 Golden Gate Dirty 30 Black Hawk 50 KM
04/30/22 Front Range Backyard Ultra Arvada Backyard
04/23/22 Smith Mountain Ultra Marathon Delta 20 Miles , 40 Miles
10/23/21 Fox Run Endurance Run Colorado Springs 12 Hours , 50 Miles
10/03/21 Rad Dirt Fest Trinidad 50 KM
10/02/21 Bear Creek Endurance Run Colorado Springs 5 Hours , 10 Hours , 12 Hours
09/12/21 Elevated Running Retreat Salida 30 Miles
09/11/21 Fountain Creek Endurance Run Fountain 12 Hours
09/05/21 Breck Crest Breckenridge 50 KM
08/28/21 Lincoln Mountain Endurance Run Larkspur 6 Hours , 12 Hours
08/07/21 Silverton Ultra Dirty Silverton 60 KM , 100 KM , 100 Miles
07/17/21 Kickers For Kids Fun Run Palmer Lake 50 KM , 50 Miles , 100 KM , 100 Miles
07/16/21 Mount Herman Adventure Run Palmer Lake 50 Miles , 100 Miles , 200 Miles
06/19/21 Happy Camper Endurance Run Westminster 50 Miles , 100 Miles , 150 Miles , 200 Miles
05/22/21 Castlewood Canyon Fun Run Franktown 6 Hours , 10 Hours
10/03/20 Tommyknocker 12-Hour & Mine Shaft Half Golden 12 Hours , 50 KM , 100 KM
09/06/20 Estes Epic Estes Park 55 KM
08/01/20 Dinosaur100 Trail Race Craig 50 Miles , 100 Miles
06/06/20 Lincoln Mountain Trail Run Larkspur 6 Hours
05/02/20 Cheyenne Mountain Ultra 10x5k Colorado Springs 50 KM
09/22/19 Sunset Trail Running Festival Gold Hill 50 KM
08/09/19 Pagosa Fun 10 Hour Ultra Run Pagosa Springs 10 Hours
03/02/19 Frozen Foot 50 Ultra Race Pagosa Springs 50 KM
08/25/18 Devil Mountain Pagosa Springs 50 KM , 50 Miles
08/11/18 Box Canyon 40 Telluride 55 KM , 40 Miles , 55 Miles
07/14/18 Under Armour Mountain Running Series - Copper Mountain Copper Mountain 50 KM
07/06/18 Steep Camp (Silverton 1000) Silverton 6 Hours , 12 Hours , 24 Hours , 48 Hours , 72 Hours , 144 Hours , 100 Miles
05/18/18 The Divide 135 Ultra Walden 135 Miles
09/02/17 Hideaway Hundred Winter Park 50 KM , 50 Miles , 100 KM , 100 Miles
07/18/17 Colorado 200 Mile Endurance Run Almont 200 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
07/04/14 Mountain Challenge Series # 3 - July Silverton 48 Hours , 240 Hours
06/14/14 Gunnison 100k Endurance Run Gunnison 100 KM
06/13/14 Mountain Challenge Series: June Silverton 24 Hours , 48 Hours , 72 Hours , 168 Hours , 240 Hours
06/29/13 Silverton 6/12/24 Hour Mountain Runs Silverton 6 Hours , 12 Hours , 24 Hours
06/01/13 Run for Aurora Roxborough 50 KM , 50 Miles
06/21/11 Gemini Adventures Grand Junction 148 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
01/17/04 Frozen Ass Trail 30 Mile Littleton 30 Miles
05/25/02 Black Canyon Montrose 50 KM
06/16/01 Colorado Trail Pearl Winter Park 24 Hours
04/07/01 Mile High Metric Challenge Littleton 50 KM
03/11/00 Alfred E. Packer 50 Mile Run Littleton 50 Miles
08/05/88 Vail Valley 50 Mile Vail 50 Miles

Recent Results

Atlanta Fat Ass 50K
Lithia Springs, GA - 40 finishers
50 KM
Frozen: H3
Bethera, SC - 34 finishers
50 Miles | 50 KM | 50 KM | 100 KM | 100 Miles
Frozen Falcon
Falcon Lake, MB - 34 finishers
8 Hours
No Hands
Auburn, CA - 66 finishers
50 KM
Vista View 360
Davie, FL - 46 finishers
6 Hours
The Guv'nor Frozen 50
Dodgeville, WI - 47 finishers
50 KM
Del Dios Trail Race
Escondido, CA - 48 finishers
50 KM
St. Croix 40 Winter Ultra
Hinckley, MN - 40 finishers
40 Miles
Frozen Gnome
Crystal Lake, IL - 58 finishers
50 KM
Crystal Springs - Winter
Woodside, CA - 25 finishers
50 KM
View All Results