Photo: Vyacheslav Argenberg · CC BY 4.0 · Wikimedia CommonsTrail RunningUTMB World Series
Trail Running Festival Desert Rats by UTMB
Fruita, United States
April 9, 2027 to April 11, 2027Date confirmed
100 km48 km21 km9 km
ForestNature & Off-Road+4
USRegional Running Calendar
Running events in Colorado
71 verified events (24 confirmed dates) and 249 races in Colorado with course maps and elevation profiles.
Events7124 confirmed dates
Competitions249Races & courses
Distances5 - 173.8 kmCourse distance range
Max. Elevation Gain+10,120 m D+Course elevation profile
Selected Events
Featured Events & Highlights
Photo: Vyacheslav Argenberg · CC BY 4.0 · Wikimedia Commons
Photo: NPS · Public Domain · Wikimedia CommonsRoad RunningWorld Athletics Label
Bolder Boulder
Boulder, United States
May 31, 2027Date confirmed
10 km
City RunFestive
Photo: Matti Blume · CC BY-SA 4.0 · Wikimedia CommonsGravel Biking
SBT GRVL
Steamboat Springs, United States
June 27, 2027Date confirmed
173.81 km117.97 km85.3 km40.72 km
MountainNature & Off-Road+3
Photo: Larry D. Moore · CC BY 4.0 · Wikimedia CommonsTrail Running
Hardrock 100
Silverton, United States
July 9, 2027 to July 11, 2027Date confirmed
160.93 km
Multi-DayHigh Altitude+4
Photo: NPS · Public Domain · Wikimedia CommonsTrail RunningUTMB Index Races
Ouray 100 Mile Endurance Run
Ouray, United States
July 16, 2027 to July 18, 2027Date confirmed
160.93 km80.47 km
MountainHigh Altitude+3
Photo: Jonathan Beech · CC BY-SA 4.0 · Wikimedia CommonsTrail RunningUTMB Index Races
Leadville Trail 100 Run
Leadville, United States
August 21, 2027 to August 22, 2027Date confirmed
160.93 km
Nature & Off-RoadMountain+3
Photo: Larry D. Moore · CC BY 4.0 · Wikimedia CommonsTrail Running
Imogene Pass Run
Ouray, United States
September 11, 2027Date confirmed
27.52 km
City RunMountain+1
Photo: Larry D. Moore · CC BY 4.0 · Wikimedia CommonsTrail Running
Pikes Peak Marathon & Ascent
Manitou Springs, United States
September 18, 2027 to September 19, 2027Date confirmed
42.2 km21.4 km
City RunMountain+3
Dates & Schedule
Race Calendar
April 2027
| Date | Event | Location | Disciplines | Distances |
|---|---|---|---|---|
| Apr 9, 2027 - Apr 11, 2027 | Trail Running Festival Desert Rats by UTMB | Fruita, Colorado, US | Trail Running | 100 km48 km21 km9 km |
May 2027
| Date | Event | Location | Disciplines | Distances |
|---|---|---|---|---|
| May 31, 2027 | Bolder Boulder | Boulder, Colorado, US | Road Running | 10 km |
June 2027
| Date | Event | Location | Disciplines | Distances |
|---|---|---|---|---|
| Jun 27, 2027 | SBT GRVL | Steamboat Springs, Colorado, US | Gravel Biking | 173.81 km117.97 km85.3 km40.72 km |
July 2027
| Date | Event | Location | Disciplines | Distances |
|---|---|---|---|---|
| Jul 9, 2027 - Jul 11, 2027 | Hardrock 100 | Silverton, Colorado, US | Trail Running | 160.93 km |
| Jul 16, 2027 - Jul 18, 2027 | Ouray 100 Mile Endurance Run | Ouray, Colorado, US | Trail Running | 160.93 km80.47 km |
August 2027
| Date | Event | Location | Disciplines | Distances |
|---|---|---|---|---|
| Aug 21, 2027 - Aug 22, 2027 | Leadville Trail 100 Run | Leadville, Colorado, US | Trail Running | 160.93 km |
September 2027
| Date | Event | Location | Disciplines | Distances |
|---|---|---|---|---|
| Sep 11, 2027 | Imogene Pass Run | Ouray, Colorado, US | Trail Running | 27.52 km |
| Sep 18, 2027 - Sep 19, 2027 | Pikes Peak Marathon & Ascent | Manitou Springs, Colorado, US | Trail Running | 42.2 km21.4 km |
Date to be announced
| Date | Event | Location | Disciplines | Distances |
|---|---|---|---|---|
| Date to be announced | Iron Horse Bicycle Classic | Durango, Colorado, US | Gravel BikingRoad Cycling | 88.51 km80.47 km43.45 km40.23 km |
| Date to be announced | Silverheels 100 | Como, Colorado, US | Trail Running | 160.93 km102 km80.47 km61 km |
| Date to be announced | Sangre de Cristo Ultras | Westcliffe, Colorado, US | Trail Running | 160.93 km98.1 km80.47 km49.6 km |
| Date to be announced | Denver Marathon | Denver, Colorado, US | Road Running | 42.2 km21.1 km10 km5 km |
Events by Month
Overview & Route Character
The region of Colorado (North America, United States) is represented in the RunningCompass catalog with 71 public events and 249 individual races, including 24 events with confirmed dates for the 2026-2027 season. Core disciplines include Trail Running, Road Running, and Gravel Biking. Key host locations include Fruita, Boulder, Steamboat Springs, and Silverton. Notable events in the selection include Trail Running Festival Desert Rats by UTMB, Bolder Boulder, and SBT GRVL.
Race distances span from 5 km to 173.8 km, reaching up to +10,120 m of elevation gain on the most demanding courses. Every race listed for Colorado includes an interactive MapLibre course map powered by OpenStreetMap, a high-resolution SVG elevation profile with gradient telemetry, and a direct GPX track download.
Questions & Answers
Frequently asked questions (FAQ)
How many running events and races take place in Colorado?
RunningCompass currently lists 71 verified events with 249 individual races in Colorado. A total of 24 events have confirmed upcoming dates, while additional annual editions include full course and distance specifications. Notable events in the selection include Trail Running Festival Desert Rats by UTMB, Bolder Boulder, and SBT GRVL.
What disciplines and race distances are offered in Colorado?
Events in Colorado focus on Trail Running, Road Running, and Gravel Biking. Course distances range from 5 km entry-level races up to 173.8 km endurance challenges. Primary host cities and towns include Fruita, Boulder, Steamboat Springs, and Silverton.
What is the course profile, terrain, and elevation gain like in Colorado?
The most selective courses in Colorado climb up to +10,120 m of positive elevation gain. Each event page provides exact altitude range, ascent (+m), descent (-m), average and maximum gradient, an interactive course map, and a downloadable GPX file.
How can I find dates and register for running events in Colorado?
The monthly race calendar on this page groups all confirmed dates chronologically alongside annual events awaiting their next date announcement. Use the discipline, distance, and month links or switch to the interactive map view (/en/events?view=map) to inspect individual event profiles and official organizer registration links.