Colorado · 10K

10K Races in Colorado

Every upcoming 10K in Colorado, all 87 of them, sorted by date. Dates, entry fees, finish-time stats from past results, and start-line maps.

87 upcoming 10K races · 40 with finish-time stats

5K 214Half Marathon 77Marathon 11Ultra 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 field2,387 finishersBroomfield Turkey Day 5K/10Kin the 5KLongest-running20th year20th Annual Golden Gallopannual tradition

10K Races by City

Centennial 30Westminster 8Colorado Springs 7Arvada 5Littleton 4Denver 4Golden 3Fort Collins 2Thornton 2Breckenridge 2Parker 2Windsor 2Berthoud 1Ridgway 1Lyons 1Pueblo 1Greeley 1Beulah 1Buena Vista 1Wellington 1Boulder 1Canon City 1Lafayette 1Alamosa 1

Soonest 10K Races in Colorado

87 total
Sat, Aug 1, 2026Popsicle 5K/10K/Half - Colorado Springs Colorado Springs, CO5K10KHalf MarathonFrom $38Details Fri, Aug 7, 2026Choice City Running Festival Fort Collins, CO1 MileHalf Marathon10K5KFrom $33Details Sat, Aug 8, 2026Summer Sizzler- Denver Thornton, CO50m1 Mile5K10KFrom $22Details Sat, Aug 8, 2026All-Out Runapalooza Arvada, COHalf Marathon10K5KFrom $55Details Sat, Aug 8, 2026Eat. Run. Adopt. 10K Berthoud, CO10KFrom $50Details Sun, Aug 9, 2026Summer Sizzler- Colorado Springs Colorado Springs, CO50m1 Mile5K10KFrom $22Details Sat, Aug 15, 2026The Cheyenne Mountain Run Colorado Springs, CO5K10K14 MilesFrom $50Details Sat, Aug 15, 2026Run for PB& J 5K/10K/13.1 DENVER/AURORA Centennial, CO5K10KHalf Marathon1 MileFrom $30Register Sat, Aug 15, 2026Bagel Run 5K/10K/13.1 DENVER/AURORA Centennial, CO5K10KHalf Marathon1 MileFrom $30Register Sat, Aug 22, 20262026 True Impact Ministries 5K/10K Centennial, CO5K10KFrom $39Details Sun, Aug 23, 2026Pioneer Prairie Dog Half, 10k & 5k Westminster, COHalf Marathon10K5KFrom $45Details Sun, Aug 23, 202611th Annual Log Hill Hustle Ridgway, CO5K10KFrom $40Details

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 Jul 27, 2026.

Common Questions About Running a 10K in Colorado

Which Colorado cities have the most 10K races?

Centennial (30), Westminster (8), Colorado Springs (7), Arvada (5) lead the state for 10K races. Those give you the most dates to choose from if your schedule is tight.

When are most 10K races held in Colorado?

September is the busiest month for 10K races in Colorado, with 18 of the 87, followed by August with 15. If you are flexible on the date, that is the quickest way to narrow things down.

How much do Colorado 10K races cost?

Entry fees for 10K races here run from free to about $500, depending on the event and how early you register.

How early should I register for a 10K in Colorado?

34 of the 87 10K races in Colorado already have a price increase scheduled, so entry gets more expensive the longer you leave it. Race pricing almost always steps up as the date approaches, and signing up early is usually the cheapest option.

Are Colorado 10K races beginner-friendly?

Yes, for the most part. Across the 37 10K races in Colorado with published results, the typical median finish is around 1:03:24, 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 10K races in Colorado?

Yes, 11 races around Colorado get you off the pavement: 6 are trail races, and 5 mix road and trail. Surfaces are not always published, so it is worth checking a specific race before you register.