| Month |
Race Name |
Events |
Location |
Near |
|
| April |
Desert R.A.T.S. 25/50 Mile |
50 mi, 25 mi |
CO, United States |
Fruita |
|
| April |
Desert R.A.T.S. 5/10 Mile |
10 mi, 5 mi |
CO, United States |
Fruita |
|
| May |
Sky Mesa Pass Trail Marathon |
26.2 mi |
CO, United States |
Grand Junction |
|
| May |
The Sage Burner |
50 km, 25 km |
CO, United States |
Gunnison |
|
| May |
Greenland Trail 50K, 25K, 8M |
50 km, 25 km, 8 mi |
CO, United States |
Larkspur |
|
| May |
Fear the Deer Trail 1/2 marathon |
13.1 mi |
CO, United States |
Littleton |
|
| June |
NIKE Summit Trail Running Series #5 - Bakers Tank |
10 km, 5 km |
CO, United States |
Breckenridge |
|
| June |
San Juan Solstice 50 |
50 mi |
CO, United States |
Lake City |
|
| June |
Turquoise Lake Half Marathon |
13.1 mi |
CO, United States |
Leadville |
|
| June |
Leadville Trail 100 Training Camp |
58 mi |
CO, United States |
Leadville |
|
| June |
Turkey Track Trail Marathon (& half) |
26.2 mi |
CO, United States |
Pagosa Springs |
|
| June |
Run For Aurora 50K and 50 Mile |
50 mi |
CO, United States |
Denver |
|
| June |
Hardscrabble Mountain Trail Run |
10 km |
CO, United States |
Colorado Springs |
|
| July |
Hardrock Hundred Mile Endurance Run |
100 mi |
CO, United States |
Silverton |
|
| July |
Leadville Trail Heavy Half Marathon |
15 mi |
CO, United States |
Leadville |
|
| July |
Leadville Trail Marathon |
26.2 mi |
CO, United States |
Leadville |
|
| July |
Leadville Silver Rush 50 Trail Run |
50 mi |
CO, United States |
Leadville |
|
| July |
Tecnica "Catch Me if You Can" Challenge |
8 mi |
CO, United States |
Breckenridge |
|
| July |
Grin and Bear It Trail Run |
15 km |
CO, United States |
Crested Butte |
|
| August |
Leadville Trail 100 |
100 mi |
CO, United States |
Leadville |
|
| August |
Pikes Peak Ascent |
13.3 mi |
CO, United States |
Manitou Springs |
|
| August |
10,000 Meters at 10,000 Feet Run |
10 km |
CO, United States |
Steamboat Springs |
|
| August |
Leadville Trail10k Run |
10 km |
CO, United States |
Leadville |
|
| August |
Mountain Chile Cha Cha |
15 mi, 7 mi, 5 km |
CO, United States |
Pagosa Springs |
|
| August |
Aspen Backcountry Marathon |
26.2 mi |
CO, United States |
Aspen |
|
| August |
Golden Beaver Trail Half Marathon |
13.1 mi |
CO, United States |
Red Feather |
|
| August |
The Mountain Ultra |
220 km |
CO, United States |
Crested Butte |
|
| September |
Creede Mountain Runs |
22 mi, 12 mi, 2 mi |
CO, United States |
Creede |
|
| September |
American Discovery Trail Marathon, Half Marathon & 5K |
26.2 mi, 13.1 mi, 5 km |
CO, United States |
Colorado Springs |
|
| September |
Kremmling Roadkill Run |
13.1 mi, 5 mi, 3 mi |
CO, United States |
Kremmling |
|
| September |
Sombrero Ranch Roundup |
4.5 mi |
CO, United States |
Estes Park |
|
| September |
Golden Leaf Half Marathon |
13 mi |
CO, United States |
Aspen |
|
| September |
Boulder Backroads Marathon & Half Marathon |
26.2 mi, 13.1 mi |
CO, United States |
Boulder |
|
| September |
Frisco Fall Trail Running Festival |
12 mi, 6 mi |
CO, United States |
Frisco |
|
| September |
Imogene Pass Trail Run |
17.1 mi |
CO, United States |
Ouray |
|
| September |
Lead King Loop |
25 km, 12.5 km |
CO, United States |
Marble |
|
| September |
Breck Crest |
23 mi, 13.3 mi, 10 km |
CO, United States |
Breckenridge |
|
| October |
24 Hours of Boulder...the Run |
100 mi |
CO, United States |
Boulder |
|
| October |
Devil Mountain |
50 mi, 50 km, 13.1 mi |
CO, United States |
Pagosa Springs |
|
