Upcoming Running Races in Colorado

Endurance Grid lists 259 running races in Colorado, from October 2026 to November 2027 across 72 cities.

259
Races
72
Cities

Running Races in Colorado

The running race calendar in Colorado is busiest in November, December, and October, with races most often in Denver, Centennial, Colorado Springs, and Arvada.

What running races are

Organized running races are one of the most accessible entry points into endurance sports. There’s a distance for every fitness level and a community at every start line. Distances run from 1-mile fun runs and 5Ks up through the 10K, half marathon, and marathon.

Most races are timed and chip-scored, with a mass or wave start and aid stations along the course. Big-city races keep the noise going the whole way; smaller races give you long stretches where it’s just you and the miles.

Frequently Asked Questions

How many running races are in Colorado?
Endurance Grid's Race Calendar lists 259 upcoming running races in Colorado across 72 cities, from October 2026 to November 2027.
What running distances are offered in Colorado?
Running races in Colorado include 1 Mile, 10 Mile, 100 Mile, 100K, 10K, 10–20 mi, 15K, 1K, and more distances.
When is running season in Colorado?
Running season in Colorado runs spring through fall. Of the upcoming running races on Endurance Grid's Race Calendar, the most are in November and December.
Which Colorado cities have running races?
Running races in Colorado are held in Denver, Centennial, Colorado Springs, Arvada, Fort Collins, Westminster, Golden, Loveland, Grand Junction, and Estes Park, plus 62 other cities.

Keep track of running races

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