Running Races in Denver, Colorado

40 upcoming races in Denver, updated nightly. For radius search from your exact zip, use the Race Finder.

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Racing in Denver: what the calendar looks like

There are 40 upcoming races on the Denver calendar over the next 12 months, with at least one in every month. Among complete calendar months, December 2026 has the most listed races, with 6. That makes Denver the busiest racing city in Colorado.

Of those, 34 offer a 5K, 14 offer a 1 Mile and 13 offer a 10K. The next marathon on the calendar is 2027 Denver Colfax Marathon on May 16. The next half marathon is RunDenver Series 2026-27 on December 6. Where fees are published, the median entry in Denver is $26, below the Colorado median of $30.

Close enough for a race-day drive: Arvada (13 races, 10 miles), Westminster (11 races, 12 miles), Centennial (22 races, 16 miles).

Races by month

November 2026

December 2026

January 2027

February 2027

March 2027

April 2027

May 2027

June 2027

July 2027

August 2027

September 2027

October 2027

November 2027

Where to stay in Denver

Race-weekend hotel search, dates prefilled for check-in the night before.

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Planning a race

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