Colorado · 10K
10Ks in Colorado
Colorado currently has 63 upcoming 10Ks with a confirmed date listed in RaceRove. Centennial, Colorado Springs, Westminster and Denver have the largest concentration of events.
November (16), October (15) and December (6) are the busiest months on the calendar right now. Another 51 annual 10Ks are waiting for next year's date to be announced.
- Upcoming, date confirmed
- 63
- Active listings
- 114
- Cities with races
- 45
More ways to browse Colorado
Upcoming 10Ks in Colorado
All 63 with a confirmed date, soonest first.
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Colorado Springs Marathon, Half, 5K, and Kids KColorado Springs, COMarathonHalf Marathon10K5K +1 more
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Windsor Marathon, Half Marathon, 10k, 5k & 1 Mile RunWindsor, COMarathonHalf Marathon10K5K +1 more ~660 runners
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Elevate Kids Fun RunGrand Junction, CO10K Individual2.5K Individual5K IndividualCharity Bib +1 more
Dates come from each race's own listing. Always confirm on the organiser's site before you book travel.
Largest 10K events in Colorado
By estimated field size across all distances at the event.
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BoulderthonBoulder, CO Usually held in September · date not confirmedMarathonHalf Marathon10K5K +1 more ~15,000 runners
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FORTitude 10KFort Collins, CO Usually held in September · date not confirmed10Kplus shorter community options ~7,000 runners
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Rock 'n' Roll Denver Marathon & Half MarathonDenver, CO Usually held in October · date not confirmedMarathonHalf10K5K ~7,000 runners
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HRCA Backcountry Wilderness Half MarathonHighlands Ranch, CO Usually held in November · date not confirmedHalf10K5K ~2,000 runners
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Garden of the Gods 10 MileColorado Springs, CO Usually held in June · date not confirmed10 Mile10KTrail RunYouth Classic ~1,800 runners
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Frosty's Frozen 5K, 10K & Half MarathonLittleton, CO Usually held in January · date not confirmedHalf Marathon10K5K ~1,500 runners
When 10Ks happen in Colorado
- January
- 5 upcoming races
- February
- 3 upcoming races
- March
- 3 upcoming races
- April
- 4 upcoming races
- May
- 2 upcoming races
- June
- 4 upcoming races
- July
- 2 upcoming races
- September
- 3 upcoming races
- October
- 15 upcoming races
- November
- 16 upcoming races
- December
- 6 upcoming races
Colorado cities with the most 10Ks
- Centennial
- 17 upcoming races
- Colorado Springs
- 7 upcoming races
- Westminster
- 5 upcoming races
- Denver
- 4 upcoming races
- Littleton
- 4 upcoming races
- Arvada
- 4 upcoming races
- Fort Collins
- 2 upcoming races
- Golden
- 2 upcoming races
Annual events awaiting their next date
These 10Ks are held every year, but the next date isn't in the listing yet. The month shown is when each is usually held.
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BoulderthonBoulder, CO Usually held in September · date not confirmedMarathonHalf Marathon10K5K +1 more ~15,000 runners
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FORTitude 10KFort Collins, CO Usually held in September · date not confirmed10Kplus shorter community options ~7,000 runners
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Rock 'n' Roll Denver Marathon & Half MarathonDenver, CO Usually held in October · date not confirmedMarathonHalf10K5K ~7,000 runners
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HRCA Backcountry Wilderness Half MarathonHighlands Ranch, CO Usually held in November · date not confirmedHalf10K5K ~2,000 runners
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Garden of the Gods 10 MileColorado Springs, CO Usually held in June · date not confirmed10 Mile10KTrail RunYouth Classic ~1,800 runners
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Frosty's Frozen 5K, 10K & Half MarathonLittleton, CO Usually held in January · date not confirmedHalf Marathon10K5K ~1,500 runners
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Run the Rocks at Red RocksMorrison, CO Usually held in October · date not confirmed10K5K ~1,500 runners
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Old Man Winter Rally RunLyons, CO Usually held in February · date not confirmed5K10KHalf Marathon ~1,000 runners
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Snowman StampedeLittleton, CO Usually held in February · date not confirmedHalf Marathon10K5K ~1,000 runners
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Run the Rockies Trail Half MarathonFrisco, CO Usually held in August · date not confirmed5K10KHalf Marathon ~600 runners
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Mt. Sneffels Half Marathon & 10KOuray, CO Usually held in August · date not confirmedHalf Marathon10K ~500 runners
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Beulah Challenge and OverIt SeriesBeulah, CO Usually held in September · next date not announced10K5K32.4 Miles
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Bound for Boston Marathon & Half Marathon - DenverDenver, CO Usually held in August · next date not announcedMarathonHalf Marathon10K5K
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Break Your Neck: Walk, Run, or RollPueblo, CO Usually held in September · next date not announced5K10K
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Choice City Running FestivalFort Collins, CO Usually held in August · next date not announced1 Miles5K10K
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Golden Harvest Half Marathon & 5k/10k - Colorado SpringsColorado Springs, CO Usually held in September · next date not announcedHalf Marathon50m1 Miles5K +1 more
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Golden Harvest Half Marathon & 5k/10k - DenverWestminster, CO Usually held in September · next date not announcedHalf Marathon50m1 Miles5K +1 more
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Labor Day Half MarathonParker, CO Usually held in September · next date not announcedHalf Marathon5K10K
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Mt. Sneffels Half Marathon-10K-Kids-Fun RunRidgway, CO Usually held in August · next date not announced10KHalf Marathon 13.1MKids Fun Run
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National Chocolate Day: Run for Chocolates 5K/10K/13.1 DENVER/AURORACentennial, CO Usually held in September · next date not announcedHalf Marathon5K10K1 Miles
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NEDNED Trail FestNederland, CO Usually held in September · next date not announced10K5KHalf Marathon
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Pioneer Prairie Dog Half, 10k & 5kWestminster, CO Usually held in August · next date not announcedHalf Marathon5K10K
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Popsicle 5K/10K/Half - Colorado SpringsColorado Springs, CO Usually held in August · next date not announcedHalf Marathon5K10K
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Run for Breast Cancer 5K/10K/13.1 DENVER/AURORACentennial, CO Usually held in August · next date not announcedHalf Marathon5K10K1 Miles
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Run for Coffee Lovers 5K/10K/13.1 DENVER/AURORACentennial, CO Usually held in July · next date not announcedHalf Marathon5K10K1 Miles
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Run for Mental Health 5K/10K/13.1 DENVER/AURORACentennial, CO Usually held in September · next date not announcedHalf Marathon5K10K1 Miles
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Run for PB& J 5K/10K/13.1 DENVER/AURORACentennial, CO Usually held in August · next date not announcedHalf Marathon5K10K1 Miles
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Sloth Run 5K/10K/13.1 DENVER/AURORACentennial, CO Usually held in August · next date not announcedHalf Marathon5K10K1 Miles
10Ks in nearby states
Guides from the RaceRove blog
- 7 min read How to Find a 5K, 10K, Half Marathon or Marathon Near You A practical way to find running races near you: pick a distance, decide how far you'll travel, read the listing properly and confirm the details before you register.
- 8 min read How to Choose the Best Half Marathon for a PR, Racecation or 50-State Challenge The best half marathon depends on what you want from it. How to choose a course for a personal record, a race worth travelling for, or an efficient stop on a 50-state challenge.
- Blog All guides Planning advice for finding, choosing and travelling to races.
10Ks in Colorado: common questions
- How many 10Ks are there in Colorado?
- RaceRove currently lists 63 upcoming 10Ks in Colorado with a confirmed date, plus 51 annual events whose next date hasn't been announced yet.
- How long is a 10K?
- A 10K is 6.2 miles (10 kilometres).
- Which Colorado cities have the most 10Ks?
- By upcoming events listed in RaceRove: Centennial (17), Colorado Springs (7), Westminster (5), Denver (4) and Littleton (4).
- When is 10K season in Colorado?
- Of the upcoming 10Ks listed, the busiest months are November (16), October (15) and December (6).
- What is the biggest 10K in Colorado?
- By estimated field size, the largest event with a 10K listed in Colorado is the BolderBOULDER 10K, with about 50,000 runners across all of its distances.
Search every 10K in Colorado
Filter by month, course profile and field size, save races to a shortlist and compare them side by side in the interactive search.