Colorado · 5K

2026-2027 5K Races in Colorado

Every upcoming 5K in Colorado, all 187 of them, sorted by date. Dates, entry fees, finish-time stats from past results, and start-line maps.

187 upcoming 5K races · 113 with finish-time stats

10K Races 91Half Marathons 87Marathons 6Ultramarathons 5
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By the numbers

The Biggest and Longest-Running

The Colorado races that stand out on the numbers: the biggest field, and the longest unbroken run of editions.

Largest field3,409 finishersYMCA Turkey Trot 5Kin the 5KLongest-running14th yearThe 14th Annual Odyssey Odyssey - 2026annual tradition

Colorado 5K Races by City

Denver 30Centennial 29Colorado Springs 24Arvada 12Westminster 9Fort Collins 7Grand Junction 6Pueblo 5Littleton 5Boulder 4Golden 4Louisville 4Thornton 3Buena Vista 3Windsor 3Steamboat Springs 2Center 2Longmont 2Parker 2Alamosa 2Greeley 2Fountain 2Highlands Ranch 2Idaho Springs 1

5K Races in Colorado by Month

October 2026 12November 2026 49December 2026 19January 2027 16February 2027 10March 2027 11April 2027 12May 2027 11June 2027 10July 2027 11August 2027 9September 2027 9

The Next 5K Runs in Colorado

187 total
Sat, Oct 24, 2026YMCA of Pueblo Race Series Pueblo, CO5KRegistration closedFrom $80Details Sun, Oct 25, 2026The 14th Annual Odyssey Odyssey - 2026 Denver, CO5K1 MilePricing TBADetails Sun, Oct 25, 2026Ghosts and Goblins 5K/10K Denver, CO5KFrom $30Details Fri, Oct 30, 2026Fleet Feet Colorado Springs Halloween Fun Run Colorado Springs, CO5KFreeDetails Sat, Oct 31, 2026Halloween Fun 5k Steamboat Springs, CO5KFrom $31Details Sat, Oct 31, 2026Zombie Fun Run 5k & 1mile Idaho Springs, CO5K1 MileFrom $25Details Sat, Oct 31, 2026Colleen De Reuck XC Classic Boulder, CO5K3K1KFrom $25Details Sat, Oct 31, 2026Spooky Sprint - Colorado Springs Colorado Springs, CO5K10KHalf MarathonFrom $42Details Sat, Oct 31, 2026Turkey Trot Center, CO5KFrom $25Details Sat, Oct 31, 2026I Ain't Scared (of 5k) Thornton, CO5K100 YardsFrom $50Details Sat, Oct 31, 2026PB&J Fuel Run 5K/10K/13.1 DENVER/AURORA Centennial, CO5K10KHalf Marathon1 MileRegistration closedFrom $30View race Sat, Oct 31, 2026Halloween Trick or Trot Run 5K/10K/13.1 DENVER/AURORA Centennial, CO5K10KHalf Marathon1 MileRegistration closedFrom $30View race

How we calculate these stats: RunSesh calculates these figures from the most recent published results of past editions, sourced from RunSignup. We show aggregates only: field size, winning and median times, and the cutoff. We never publish individual finisher tables. Last updated Oct 25, 2026.

Common Questions About Running a 5K in Colorado

Which Colorado cities have the most 5K races?

Denver (30), Centennial (29), Colorado Springs (24), Arvada (12) lead the state for 5K races. Those give you the most dates to choose from if your schedule is tight.

When are most 5K races held in Colorado?

November is the busiest month for 5K races in Colorado, with 49 of the 187, followed by October with 20. If you are flexible on the date, that is the quickest way to narrow things down.

Are Colorado 5K races beginner-friendly?

Yes, for the most part. Across the 113 5K races in Colorado with published results, the typical median finish is around 36:28, which means half of every one of those fields came in slower than that. Recreational runners and walk-runners are the bulk of these fields, not the exception.

Are there trail 5K races in Colorado?

Yes, 10 races around Colorado get you off the pavement: 5 are trail races, and 5 mix road and trail.