in 4 days
The Long View Marathon
Fort Collins, CO625 ft gain
MarathonHalf Marathon+1
Open until Oct 11from $45
Half Marathons Near Denver, CO
As of October 6, 2026, Crewable lists 18 upcoming half marathons near Denver, CO from October 2026 to August 2027. The next is Breckenridge RunFest on October 10 in Breckenridge, CO. Registration is open for 14.
Sources: UltraSignup, RunSignUp, UTMB, race organizers and race websites
With aid station data
7 aid
3 aid5 aid
Race calendar
October 2026
9 racesCoffee Lovers Run 5K/10K/13.1 DENVER/AURORA
Centennial, COHalf Marathon10K+2Open until Oct 10from $30Halloween Trick or Trot Run 5K/10K/13.1 DENVER/AURORA
Centennial, COHalf Marathon10K+2Open until Oct 31from $30
November 2026
7 racesVeterans Day Freedom Run 5K/10K/13.1 DENVER/AURORA
Centennial, COHalf Marathon10K+2Open until Nov 14from $30
May 2027
1 raceAugust 2027
1 raceQuick answers
What is the next half marathon near Denver, CO?
Breckenridge RunFest, on Saturday, October 10, 2026, in Breckenridge, CO. Distances: Marathon, Half Marathon, 10K.
What is the closest half marathon to Denver?
Westy Half & 5k in Westminster, CO, about 7 miles from Denver, on October 11, 2026.
How many half marathons near Denver, CO have open registration?
14 of the 18 list registration as open as of October 6, 2026, including Breckenridge RunFest, Coffee Lovers Run 5K/10K/13.1 DENVER/AURORA and Cookie Run 5K/10K/13.1 DENVER/AURORA.
What is the busiest month for half marathons near Denver, CO?
October 2026, with 9 of the 18. November 2026 follows with 7.
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