10K Races in Colorado 2026 | Upcoming Races & Dates | My Next Race

There are 24 10K races in Colorado scheduled for 2026. The next is the South Fork Alder Ass Race in South Fork on September 5. Colorado 10K races run primarily September through July.

South Fork Alder Ass Race

Sat, Sep 5 · South Fork, CO South Fork

Alder Ass Race Mini CourseAlder Ass Race Standard CourseGhost Runners

From $40 Closed

The Beaver Run

Sat, Sep 5 · Breckenridge, CO Breckenridge

5K Run10K Run15K Run

From $40 Open Closing Soon

10k at 10,000 Feet

Sun, Sep 6 · Steamboat Springs, CO Steamboat Springs

5k10k

From $25 Open Closing Soon

14th Annual Superhero Event

Thu, Sep 10 · Greeley, CO Greeley

1 Mile - 13+Virtual 1 Mile1 Mile - 12 & Under +5

From $20 Open Closing Soon

RMRR September 5k/10k

Sun, Sep 13 · Thornton, CO Thornton

5k10k

From $10 Open Closing Soon

Wellington STAR Foundation 5K 10K

Sat, Sep 19 · Wellington, CO Wellington

5K RunStroller or Dog 5KKids 5K (ages 3-12) +3

From $10 Open

Chile & Frijole Hot to Trot 5K/10K

Sun, Sep 20 · Pueblo, CO Pueblo

5K Run10K Run

From $35 Closed

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

Sat, Sep 26 · Parker, CO Parker

5K10K

From $40 Open Closing Soon

Lafayette Music Fest -5K - 10K

Sat, Oct 3 · Lafayette, CO Lafayette

5K10K

From $40 Open

Fall Series - Get Dirty! Get Muddy!

Sun, Oct 4 · Colorado Springs, CO Colorado Springs

Fall Series IFall Series IIFall Series III +2

From $39 Closed

RMRR October 5k/8mi

Sun, Oct 4 · Aurora, CO Aurora

5k8mi

From $10 Open

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

Sun, Oct 11 · Littleton, CO Littleton

Your Story Isn't Over Kids RunYour Story Isn't Over Virtual 5kYour Story Isn't Over 5k +1

From $20 Open

The Great Trailhead Foot Race 5 & 10 Miler

Sat, Oct 17 · Lakewood, CO Lakewood

5 Miler10 Mile

From $55 Open

Spooky Sprint - Colorado Springs

Sat, Oct 31 · Colorado Springs, CO Colorado Springs

5k10KHalf Marathon +4

From $17 Open Closing Soon 5 spots left

Feet for Justice Run

Sun, Nov 1 · Denver, CO Denver

5KVirtual Runner10K +1

From $10 Open

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

Sat, Nov 7 · Denver, CO Denver

1 Mile (ish) Walk of Hope (untimed)5k Run/Walk10k Run

From $16 Open

Alamosa Veterans Memorial Park Race

Sat, Nov 7 · Alamosa, CO Alamosa

Alamosa Veterans Memorial Park 10kAlamosa Veterans Memorial Park 5k

From $20 Open

Denver Veterans Day Run

Sat, Nov 14 · Denver, CO Denver

5K Run/Walk10K Run/Walk10K Rippetoe Rucksack Challenge

From $45 Open

Pumpkin Pie 5K/10K

Sat, Nov 21 · Denver, CO Denver

5KVirtual Race10K

From $30 Open

Broomfield Turkey Day 5K/10K

Thu, Nov 26 · Broomfield, CO Broomfield

5k10kKids Fun Run (Approx 1/2 Mile) UNTIMED

From $17 Open

Santa Catch 5k & 10k

Sat, Dec 12 · Windsor, CO Windsor

1 Mile Kids Fun RunSanta Catch 5KSanta Catch 10k

From $15 Open

Erin Go Bragh 7.77k

Sat, Mar 13 · Westminster, CO Westminster

7.77k7.77k

From $33 Open

Colorado Women's Classic - Westminster

Sun, May 9 · Westminster, CO Westminster

5k5k10 Miler +3

From $35 Open

Let Freedom Run 5k/10k - Louisville

Sun, Jul 4 · Louisville, CO Louisville

5k5k10k +1

From $30 Closed