Win your entry for the 100km run Biel in Switzeland

2015 - 2016 Colorado Race Calendar

Browse our Marathons, Half Marathons, Ultra marathons, Multiday events organized in Colorado among 318 races.

318 races

Frozen Dead Guy 50km

  • North America | USA | Colorado | Nederland
  • Ultramarathon - 50 kilometers
  • January 31, 2015 - 07:30
  • Snow Trail Mountain

Game Day 5K

  • North America | USA | Mountain Region | Colorado | Colorado Springs
  • Shorter than 10 km race - 5 kilometers
  • February 01, 2015 - 10:15
  • Road Running

Super Half Marathon

  • North America | USA | Mountain Region | Colorado | Colorado Springs
  • Half Marathon
  • February 01, 2015 - 10:00
  • Road Running

Ralston Creek 5K

  • North America | USA | Mountain Region | Colorado | Arvada
  • Shorter than 10 km race - 5 kilometers
  • February 08, 2015
  • Road Running

Ralston Creek Half-Marathon

  • North America | USA | Mountain Region | Colorado | Arvada
  • Half Marathon
  • February 08, 2015
  • Road Running

Headless Horsetooth Fat Ass 50K

  • North America | USA | Colorado | Loveland
  • Ultramarathon - 50 kilometers
  • February 21, 2015 - 08:00
  • Trail Mountain

DreamCatcher Half Marathon

  • North America | USA | Colorado | Grand Junction
  • Half Marathon
  • March 07, 2015 - 08:00
  • Charity

High Line Canal 100K

  • North America | USA | Colorado | Littleton
  • Ultramarathon - 100 kilometers
  • March 14, 2015 - 05:00
  • Flat

Salida to Turret 1/2 Marathon

  • North America | USA | Mountain Region | Colorado | Salida
  • Half Marathon
  • March 14, 2015 - 09:00
  • Trail

Salida to Turret Marathon

  • North America | USA | Mountain Region | Colorado | Salida
  • Marathon
  • March 14, 2015 - 09:00
  • Trail

Spring Fever 10K

  • North America | USA | Mountain Region | Colorado | Golden
  • 10k race
  • March 22, 2015 - 09:30
  • All-Out Multisport Productions

Spring Fever 5K

  • North America | USA | Mountain Region | Colorado | Golden
  • Shorter than 10 km race - 5 kilometers
  • March 22, 2015 - 09:40
  • All-Out Multisport Productions

Spring Fever Half Marathon

  • North America | USA | Mountain Region | Colorado | Golden
  • Half Marathon
  • March 22, 2015 - 09:00
  • All-Out Multisport Productions

Dust Bowl Marathon Series Day 4 Half-Marathon

  • North America | USA | Mountain Region | Colorado | Lamar
  • Half Marathon
  • March 28, 2015 - 06:30

Dust Bowl Marathon Series Day 4 Marathon

  • North America | USA | Mountain Region | Colorado | Lamar
  • Marathon
  • March 28, 2015 - 06:30