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Race calendar

10K Races in Colorado

102 upcoming 10K races across Colorado. Run This events are listed first — pick a city below to narrow it down.

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Cities in ColoradoCentennialColorado SpringsWestminsterArvadaDenverLittletonGolden

102 races

Thu, Aug 6, 2026

Choice City Running Festival

Fort Collins, CO

Outside1 mileMarathon10K5K

Fri, Aug 7, 2026

Summer Sizzler- Denver

Thornton, CO

Outside50 m1 mile5K10K

Fri, Aug 7, 2026

All-Out Runapalooza

Arvada, CO

OutsideMarathon10K5K

Fri, Aug 7, 2026

Eat. Run. Adopt. 10K

Berthoud, CO

Outside10K

Sat, Aug 8, 2026

Summer Sizzler- Colorado Springs

Colorado Springs, CO

Outside50 m1 mile5K10K

Mon, Aug 10, 2026

Into the Hills Eltuck 10k

Bellvue, CO

Outside10K

Fri, Aug 14, 2026

Run for PB& J 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Aug 14, 2026

Farish Mt Bike Race

Woodland Park, CO

Outside6.0 mi12.0 mi16.0 mi

Fri, Aug 14, 2026

Bagel Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Aug 14, 2026

The Cheyenne Mountain Run

Colorado Springs, CO

Outside5K10K14.0 mi

Fri, Aug 21, 2026

2026 True Impact Ministries 5K/10K

Centennial, CO

Outside5K10K

Sat, Aug 22, 2026

Pioneer Prairie Dog Half, 10k & 5k

Westminster, CO

OutsideMarathon10K5K

Sat, Aug 22, 2026

11th Annual Log Hill Hustle

Ridgway, CO

Outside5K10K

Fri, Aug 28, 2026

Sloth Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Aug 28, 2026

Run for Breast Cancer 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Sat, Aug 29, 2026

James Test Site

Lyons, CO

Outside5K10K

Fri, Sep 4, 2026

Break Your Neck: Walk, Run, or Roll

Pueblo, CO

Outside5K10K

Fri, Sep 4, 2026

Golden Harvest Half Marathon & 5k/10k - Denver

Westminster, CO

Outside50 m1 mile5K10K

Fri, Sep 4, 2026

The Beaver Run

Breckenridge, CO

Outside5K10K9.3 mi161 m

Sat, Sep 5, 2026

Golden Harvest Half Marathon & 5k/10k - Colorado Springs

Colorado Springs, CO

Outside50 m1 mile5K10K

Sun, Sep 6, 2026

Labor Day Half Marathon

Parker, CO

OutsideMarathon10K5K

Wed, Sep 9, 2026

14th Annual Superhero Event

Greeley, CO

Outside10K5K1 mile

Fri, Sep 11, 2026

Trail Sisters Women's Half Marathon & 10k

Buena Vista, CO

OutsideMarathon10K

Fri, Sep 11, 2026

National Chocolate Day: Run for Chocolates 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Sep 11, 2026

Run for Mental Health 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Sat, Sep 12, 2026

RMRR September 5k/10k

Thornton, CO

Outside10K5K

Fri, Sep 18, 2026

Autumn Run

Buena Vista, CO

OutsideMarathon10K5K1000 m

Fri, Sep 18, 2026

All-Out Fall Fest

Westminster, CO

OutsideMarathon10K5K

Fri, Sep 18, 2026

Wellington STAR Foundation 5K 10K

Wellington, CO

Outside5K10K

Fri, Sep 18, 2026

Beulah Challenge and OverIt Series

Beulah, CO

Outside10K5K32.4 mi

Fri, Sep 18, 2026

Battle by the Brook

Deckers, CO

Outside20.0 mi6.0 mi

Sat, Sep 19, 2026

20th Annual Golden Gallop

Golden, CO

Outside5K10K12.4 mi

Sat, Sep 19, 2026

Chile & Frijole Hot to Trot 5K & 10K

Pueblo, CO

Outside5K10K

Fri, Sep 25, 2026

Oktoberfest Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Sep 25, 2026

Run for Donuts 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Sep 25, 2026

Parker Parks and Recreation So Long to Summer 5K/10K

Parker, CO

Outside5K10K

Sat, Sep 26, 2026

Running for Children's Rights to Both Parents - 9 of 50 Half Marathons in 50 States - Colorado

Boulder, CO

OutsideMarathon5K10K

Fri, Oct 2, 2026

HRCA Wildcat Mountain Trail Races

Littleton, CO

Outside10.0 mi10K

Fri, Oct 2, 2026

Rim to Rim Royal Gorge Races: 5K Road Run, Trail 8 Mile, Trail Half Marathon

Canon City, CO

Outside5K8.0 miMarathon10K

Fri, Oct 2, 2026

Spooky Sprint - Denver

Littleton, CO

Outside50 m1 mile5K10K

Fri, Oct 2, 2026

Lafayette Music Fest -5K - 10K

Lafayette, CO

Outside10K5K

Sat, Oct 3, 2026

Windsor Marathon, Half Marathon, 10k, 5k & 1 Mile Run

Windsor, CO

OutsideMarathon10K5K1 mile

Fri, Oct 9, 2026

Breckenridge RunFest

Breckenridge, CO

OutsideMarathon10K5K1 mile

Fri, Oct 9, 2026

Bagel Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Oct 9, 2026

Coffee Lovers Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Sat, Oct 10, 2026

Your Story Isn't Over 5k/10k/Kids 1-Mile

Littleton, CO

Outside1 mile10K5K

Fri, Oct 16, 2026

Chili Chase

Durango, CO

Outside6.5 mi

Sat, Oct 24, 2026

Ghosts and Goblins 5K/10K

Denver, CO

Outside5K10K

Fri, Oct 30, 2026

Spooky Sprint - Colorado Springs

Colorado Springs, CO

Outside1 mile5K10KMarathon

Fri, Oct 30, 2026

PB&J Fuel Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Oct 30, 2026

Halloween Trick or Trot Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Sat, Oct 31, 2026

All-Out Kooky-Spooky

Golden, CO

OutsideMarathon10K5K

Sat, Oct 31, 2026

Feet for Justice Run

Denver, CO

Outside10K5K

Fri, Nov 6, 2026

Alamosa Veterans Memorial Park Race

Alamosa, CO

Outside5K10K

Fri, Nov 6, 2026

Turkey Trails- Denver

Littleton, CO

Outside50 m1 mile5K10K

Fri, Nov 6, 2026

City Park Classic (5k/10k & 1 Mile Walk of Hope for Pancreatic Cancer Research)

Denver, CO

Outside5K10K1 mile

Sat, Nov 7, 2026

Turkey Trails - Colorado Springs

Colorado Springs, CO

Outside50 m1 mile5K10K

Fri, Nov 13, 2026

Run for Mental Health 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Nov 13, 2026

Veterans Day Freedom Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Nov 13, 2026

Denver Veterans Day Run

Denver, CO

Outside5K10K

Fri, Nov 20, 2026

TURKEY TREK (13.1, 10k, 5k & 2k)

Arvada, CO

OutsideMarathon10K5K1.2 mi

Fri, Nov 20, 2026

Pumpkin Pie 5K/10K

Denver, CO

Outside5K10K

Wed, Nov 25, 2026

Broomfield Turkey Day 5K/10K

Broomfield, CO

Outside10K5K2.0 mi

Fri, Nov 27, 2026

Coffee Lovers Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Nov 27, 2026

Thanksgiving Gobble Trot Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Dec 4, 2026

All-Out Fa La La

Westminster, CO

OutsideMarathon10K5K

Fri, Dec 4, 2026

Candy Cane Course - Colorado Springs

Colorado Springs, CO

Outside50 m1 mile5K10K

Fri, Dec 4, 2026

Chasing Santa 5k/Cycling Santa Toy Drive Presented by: Springs Law Group

Colorado Springs, CO

Outside5K6.0 mi10.0 mi21.0 mi

Fri, Dec 4, 2026

Toy Drop

Loveland, CO

Outside5K10K9.3 mi

Sat, Dec 5, 2026

Candy Cane Course - Denver

Westminster, CO

Outside1 mile5K10K50 m

Fri, Dec 11, 2026

Run for Breast Cancer 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Dec 11, 2026

Sunrise Marathon 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Dec 11, 2026

Santa Catch 5k & 10k

Windsor, CO

Outside5K10K1 mile

Fri, Dec 25, 2026

A Merry Christmas Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Dec 25, 2026

New Year's Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Jan 8, 2027

All-Out Polar Prowl

Arvada, CO

OutsideMarathon10K5K

Fri, Jan 15, 2027

MLK Jr. Freedom Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Jan 15, 2027

Sunrise Marathon 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Jan 29, 2027

Alley Loop

Crested Butte, CO

OutsideMarathon10K5K1.9 mi

Fri, Jan 29, 2027

Coffee Lover Run DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Jan 29, 2027

Run for Donut DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Feb 5, 2027

All-Out Mardi Crawl

Arvada, CO

OutsideMarathon10K5K

Fri, Feb 5, 2027

Stories Trail Runs

Colorado Springs, CO

Outside6.7 miMarathon19.6 mi

Fri, Feb 12, 2027

Valentine's Day Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Feb 12, 2027

Run for Chocolate 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Sat, Mar 13, 2027

Lucky Brew Race 5K, 10K, 15k & Half Marathon

Severance, CO

Outside5K10K9.3 mi966 m

Fri, Mar 19, 2027

Sunrise Marathon 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Sat, Mar 20, 2027

All-Out Spring Fever

Golden, CO

OutsideMarathon10K5K

Fri, Apr 9, 2027

Run for Bagels 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Apr 23, 2027

All-Out Beat the Heat

Westminster, CO

OutsideMarathon10K5K

Fri, Apr 23, 2027

Coffee Lover Run DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Sat, May 1, 2027

The Colorado Marathon

Fort Collins, CO

OutsideMarathon10K5K

Sat, May 8, 2027

Colorado Women's Classic - Westminster

Westminster, CO

Outside5K10K10.0 mi

Fri, May 14, 2027

Endure Trail Runs

Divide, CO

Outside6.8 mi14.1 mi26.5 mi

Fri, May 21, 2027

Samson's Revenge

Estes Park, CO

Outside6.5 mi15.5 mi31.1 mi

Sat, Jun 5, 2027

Colorado 13er (Half Marathon/10k/5k)

Louisville, CO

OutsideMarathon10K5K

Fri, Jun 11, 2027

All-Out Summer Breeze

Arvada, CO

OutsideMarathon10K5K

Fri, Jun 11, 2027

Summits Trail Runs

Granby, CO

Outside6.1 mi13.9 mi27.8 mi33.9 mi

Wed, Jun 23, 2027

Race in the Clouds - Alma Dirt Festival 2027

Alma, CO

Outside38.0 mi26.0 miMarathon22.0 mi

Sat, Jul 3, 2027

Let Freedom Run 5k/10k - Louisville

Louisville, CO

Outside5K10K

Fri, Jul 9, 2027

All-Out Dog Days

Westminster, CO

OutsideMarathon10K5K

Fri, Jul 16, 2027

Summer Splash Prairie Dog Half, 10k, & 5k

Castle Rock, CO

OutsideMarathon10K5K

10K races by city in Colorado

Centennial30Colorado Springs8Westminster8Arvada5Denver5Littleton4Golden3