Colorado · 10K
10K Races in Colorado
Colorado currently has 75 upcoming 10Ks with a confirmed date listed in RaceRove. Centennial, Colorado Springs, Westminster and Denver have the largest concentration of events.
November (16), January (7) and August (7) are the busiest months on the calendar right now. Another 41 annual 10Ks are waiting for next year's date to be announced.
- Upcoming, date confirmed
- 75
- Active listings
- 116
- Cities with races
- 46
More ways to browse Colorado
Upcoming 10Ks in Colorado
All 75 with a confirmed date, soonest first.
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City Park Classic (5k/10k & 1 Mile Walk of Hope for Pancreatic Cancer Research)Denver, CO5K10K ~2,743 runners
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Run Through Time Trail Marathon and Half MarathonSalida, COMarathonHalf Marathon10K5K +1 more ~3,133 runners
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Lucky Brew Race 5K, 10K, 15k & Half MarathonSeverance, COHalf Marathon5K10K9.3 Miles +1 more ~2,200 runners
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Elevate Kids Fun RunGrand Junction, CO10K Individual2.5K Individual5K IndividualCharity Bib +1 more
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Bound for Boston Marathon & Half Marathon - DenverDenver, COMarathonHalf Marathon10K5K ~150 runners
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Golden Harvest Half Marathon & 5k/10k - DenverWestminster, COHalf Marathon50m1 Mile5K +1 more ~10 runners
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Golden Harvest Half Marathon & 5k/10k - Colorado SpringsColorado Springs, COHalf Marathon50m1 Mile5K +1 more
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Colorado Springs Marathon, Half, 5K, and Kids KColorado Springs, COMarathonHalf Marathon10K5K +1 more ~2,500 runners
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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The Long View MarathonFort Collins, CO Usually held in October · next date not announcedMarathon10K5K ~6,084 runners
When 10Ks happen in Colorado
- January
- 7 upcoming races
- February
- 5 upcoming races
- March
- 3 upcoming races
- April
- 4 upcoming races
- May
- 3 upcoming races
- June
- 5 upcoming races
- July
- 4 upcoming races
- August
- 7 upcoming races
- September
- 7 upcoming races
- October
- 7 upcoming races
- November
- 16 upcoming races
- December
- 7 upcoming races
Colorado cities with the most 10Ks
- Centennial
- 14 upcoming races
- Colorado Springs
- 10 upcoming races
- Westminster
- 8 upcoming races
- Denver
- 6 upcoming races
- Arvada
- 5 upcoming races
- Littleton
- 4 upcoming races
- Fort Collins
- 2 upcoming races
- Golden
- 2 upcoming races
Running in Colorado cities
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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The Long View MarathonFort Collins, CO Usually held in October · next date not announcedMarathon10K5K ~6,084 runners
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Parker Parks and Recreation So Long to Summer 5K/10KParker, CO Usually held in September · next date not announced5K10K ~2,500 runners
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Run the Rocks at Red RocksMorrison, CO Usually held in October · next date not announced10K5K ~1,500 runners
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Windsor Marathon, Half Marathon, 10k, 5k & 1 Mile RunWindsor, CO Usually held in October · next date not announcedMarathonHalf Marathon10K5K +1 more ~660 runners
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Your Story Isn't Over 5k/10k/Kids 1-MileLittleton, CO Usually held in October · next date not announced1 Mile10K5K ~300 runners
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Aspen Valley MarathonAspen, CO Usually held in July · next date not announcedMarathon10K5K ~222 runners
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Above the Clouds UltraWoodland Park, CO Usually held in October · next date not announced50K10K ~200 runners
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Bridge Burner UltraCanon City, CO Usually held in October · next date not announced35 Miler50K35K10K ~119 runners
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Staunton Rocks! Marathon and Half MarathonPine, CO Usually held in August · next date not announcedMarathonHalf Marathon10K5K ~112 runners
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Into the Hills Eltuck 10kBellvue, CO Usually held in August · next date not announced10K ~100 runners
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The Bear ChaseLakewood, CO Usually held in October · next date not announced100K50 Mile50KHalf Marathon +2 more ~89 runners
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Bobcat Trail RacesColorado Springs, CO Usually held in October · next date not announced50K25K10K5K ~33 runners
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Snow Mountain RanchGranby, CO Usually held in September · next date not announced50K33KHalf Marathon10K +1 more ~33 runners
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Bagel Run 5K/10K/13.1 DENVER/AURORACentennial, CO Usually held in October · next date not announcedHalf Marathon5K10K1 Mile
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Beulah Challenge and OverIt SeriesBeulah, CO Usually held in September · next date not announced10K5K32.4 Miles
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Choice City Running FestivalFort Collins, CO Usually held in August · next date not announced1 Mile5K10K
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HRCA Wildcat Mountain Trail RacesLittleton, CO Usually held in October · next date not announced10 Miles10K
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Lafayette Music Fest -5K - 10KLafayette, CO Usually held in October · next date not announced10K5K
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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 Mile
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NEDNED Trail FestNederland, CO Usually held in September · next date not announced10K5KHalf Marathon
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Oktoberfest Run 5K/10K/13.1 DENVER/AURORACentennial, CO Usually held in September · next date not announcedHalf Marathon5K10K1 Mile
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Run for Breast Cancer 5K/10K/13.1 DENVER/AURORACentennial, CO Usually held in August · next date not announcedHalf Marathon5K10K1 Mile
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Run for Coffee Lovers 5K/10K/13.1 DENVER/AURORACentennial, CO Usually held in July · next date not announcedHalf Marathon5K10K1 Mile
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Run for Donuts 5K/10K/13.1 DENVER/AURORACentennial, CO Usually held in September · next date not announcedHalf Marathon5K10K1 Mile
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Run for Mental Health 5K/10K/13.1 DENVER/AURORACentennial, CO Usually held in September · next date not announcedHalf Marathon5K10K1 Mile
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Run for PB& J 5K/10K/13.1 DENVER/AURORACentennial, CO Usually held in August · next date not announcedHalf Marathon5K10K1 Mile
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Sloth Run 5K/10K/13.1 DENVER/AURORACentennial, CO Usually held in August · next date not announcedHalf Marathon5K10K1 Mile
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The Beaver RunBreckenridge, CO Usually held in September · next date not announced5K10K9.3 Miles0.1 Miles
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The Cheyenne Mountain RunColorado Springs, CO Usually held in August · next date not announced5K10K14 Miles
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Trail Sisters Women's Half Marathon & 10kBuena Vista, CO Usually held in September · next date not announcedHalf Marathon5K10K
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Wellington STAR Foundation 5K 10KWellington, CO Usually held in September · next date not announced5K10K
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.
- 4 min read Diplo's Run Club 2026-27: Every City, Date and Course Diplo's Run Club is a 5K with a post-race concert. Every US date for 2026-27 (San Francisco, New York, Los Angeles, San Diego and Phoenix), start times and courses.
- 8 min read How to Train for Your First 10K A practical first-10K framework with easy running, one longer run, rest, and realistic progress.
- Blog All guides Planning advice for finding, choosing and travelling to races.
10K Races in Colorado: common questions
- How many 10Ks are there in Colorado?
- RaceRove currently lists 75 upcoming 10Ks in Colorado with a confirmed date, plus 41 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 (14), Colorado Springs (10), Westminster (8), Denver (6) and Arvada (5).
- When is 10K season in Colorado?
- Of the upcoming 10Ks listed, the busiest months are November (16), January (7) and August (7).
- 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.