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Marathons in Colorado

Planning to run a Marathon in Colorado? Check out the full list below to see which races athletes have rated as the best marathons in Colorado. View more running races by changing filters and expanding your search area.

Pueblo Marathon

Pueblo, Colorado

February 25th, 2018

Running: Half Marathon Trail Run, Marathon

Desert RATS Trail Running Festival - Trail Marathon & 50K

Fruita, Colorado

April 14th, 2018

Running: Marathon Trail Run, 50K (Ultra)

Vail Valor Races

Vail, Colorado

May 28th, 2018

Running: Half Marathon, Marathon, 1 Mile, 5 Miles, 5K

Morgan Valley Marathon

Littleton, Colorado

June 30th, 2018

Running: Half Marathon, Marathon, 5K

Aspen Valley Marathon

Aspen, Colorado

July 14th, 2018

Running: Half Marathon, Marathon, 5K

Under Armour Mountain Running Series - Copper Mountain

Copper Mountain, Colorado

July 14th, 2018

Running: Half Marathon, Marathon, 10K, 50K Trail Run, 5K Trail Run

Kickers For Kids Fun Run

Palmer Lake, Colorado

July 21st, 2018

Running: Half Marathon, Marathon, 10K, 50 Miles, 50K Trail Run, 5K Trail Run

Silverton Alpine Marathon & 50K

Silverton, Colorado

July 28th, 2018

Running: Marathon, 50 Miles (Ultra)

Aspen Backcountry Marathon

Aspen, Colorado

August 11th, 2018

Running: Half Marathon Trail Run, Marathon

Mt Sneffels Marathon

Ouray, Colorado

August 11th, 2018

Running: Half Marathon, Kids Run/Fun Run, Marathon

Steamboat Stinger Trail Marathon

Steamboat Springs, Colorado

August 12th, 2018

Running: Half Marathon Trail Run, Marathon

Pikes Peak Marathon

Manitou Springs, Colorado

August 19th, 2018

Running: Marathon Trail Run

Marathon of the Legends Team Relay

Walsenburg, Colorado

August 26th, 2018

Running: Marathon Relay

Mountain Mining Days Marathon Relay

Walsenburg, Colorado

August 26th, 2018

Running: Marathon Relay

American Discovery Trail Marathon

Colorado Springs, Colorado

September 3rd, 2018

Running: Half Marathon Trail Run, Marathon

Five Track Mind Marathons - Walsh Marathon

Walsh, Colorado

September 3rd, 2018

Running: Half Marathon, Marathon

American Heroes Run

Longmont, Colorado

September 8th, 2018

Running: Half Marathon, Marathon, 24 Hours, 5K, 9 Hours, 9.1 Miles

Mountain Rats - Eagle, CO

Eagle, Colorado

September 8th, 2018

Running: Half Marathon Trail Run, Marathon, 50K Trail Run

Boulder Backroads Marathon

Boulder, Colorado

September 9th, 2018

Running: Half Marathon Trail Run, Marathon, 13K

Breckenridge Road Marathon

Breckenridge, Colorado

September 15th, 2018

Running: Half Marathon, Marathon, 5K