Found 295 races

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Connect with runners, find training partners, and celebrate every finish together

OCT
17

Denver, CO
• 28.8 miles
$30
Participants joining our inaugural annual 5K Run/Walk will help bring clean, sustainable water solutions to communities in need and support our disaster response initiatives. We will be hosting...
5K
OCT
17

Lakewood, CO
• 21.9 miles
$65 -$90
Welcome to the Great Trailhead Foot Race at Bear Creek Lake Park!  Featuring legitimate TRAILS in the shadow of Denver's skyline, you'll love the single-track and dirt as you race 5 miles, or a...
5m 10m
60
OCT
18

Denver, CO
• 25.7 miles
10K Half Marathon
32
OCT
18

Palmer Lake, CO
• 17.2 miles
$15 -$45
Colorado’s Shortest (and Most Legendary) Run is Back!     Mark your calendars: Sunday, October 18th, 2026, for the 12th Annual PALMER LAKE .5K — yes, that’s Point Five K — brought to you by Awake...
5K
1
OCT
24

Arvada, CO
• 33.2 miles
$10 -$55
Voted Best of the Best in Arvada for Non Profit Events by Colorado Community Media! Join the Apex Foundation for the 6th Anniversary Trick or Trot 5K, presented by Intermountain Health! Runners...
5K
17
OCT
24

Pueblo, CO
• 76.6 miles
$30 -$50
Get ready to run for your life at the 2nd annual Spooky Sprint 5k! This eerie evening race winds through a chilling course at the YMCA of Pueblo. The thrilling Halloween themed race is perfect...
5K
27
OCT
25

Denver, CO
• 26.2 miles
$30 -$50
The Ghosts & Goblins 5K/10K is a family, friendly event to celebrate the upcoming holiday season. Start your holiday traditions with a fun morning of fitness and friends by joining us at Denver’s...
5K 10K
53
OCT
25

Denver, CO
• 24.9 miles
The Odyssey Odyssey Fun Run is entering its 14th year. It has always been centered around having fun and exercising our bodies.  It is an all-inclusive event, which is why all the races are FREE...
1m 5K
79
OCT
31

Idaho Springs, CO
• 32.4 miles
$20
🎃 Halloween Fun Run – 5K & 1 Mile (Zombie Theme)Saturday, October 25, 2025 • 10 AM – 12 PM320 Chicago Creek Rd, Idaho Springs, CO Whether you shuffle like the undead, sprint like you're being...
1m 5K
10
OCT
31

Thornton, CO
• 2.6 miles
$40 -$60
Dress up and run spooky and silly at the I Ain't Scared (of 5k) in Thornton!  Fun music, Halloween snacks and costumes galore!!  This event only comes around once every few years when Halloween...
0m 5K
14
OCT
31

Loveland CO
• 34.0 miles
Brisk autumn running in Colorado – OH YEA! Join us for a family fun event with FIVE distance options at the beautiful Boyd Lake State Park venue. Choose your adventure! Heavy 5K, 10K, 15K (4, 7...
1m 4m 7m 10m
18
OCT
31

Centennial, CO
• 23.4 miles
$30 -$45
Smooth vibes. Sweet energy. Bold moves. 🥜🍓 PB&J Fuel Run is all about a combo that just works. Mix your pace, spread the fun, and stick with it all the way to the finish. No stress, no...
1m 5K 10K Half Marathon
13
NOV
1

Denver, CO
• 26.2 miles
$10 -$45
Join us for the Feet for Justice Run IN-PERSON or VIRTUALLY this November! The Feet for Justice Run is a family-friendly event in Denver that brings together the community members, businesses,...
5K 10K
7
NOV
7

Loveland, CO
• 35.6 miles
$20 -$30
Our community is the only city in the nation to follow the old tradition of ringing bells throughout the town in the early morning hours of Veteran’s Day. This race will mimic some of those old...
2m
31
NOV
7

Denver, CO
• 25.9 miles
$20 -$75
Get ready for the winter season while enjoying a race with your friends at the City Park Classic!    5k/10k finishers earn a MEDAL!   November is Worldwide Pancreatic Cancer Awareness month -...
1m 5K 10K
41
NOV
7

Fort Collins, CO
• 41.0 miles
$105 -$275
Welcome to the Colorado 24 Hour Run! We aim to provide a fun, welcoming race experience that allows everyone to find a challenge, no matter where you’re at on your running journey. Want to see...
34
NOV
7

Lone Tree, CO
• 27.7 miles
$65 -$95
The 18th Annual Backcountry Wilderness Half Marathon returns to Highlands Ranch on Saturday, November 7, 2026, at 9:00 a.m. This 13.1-mile race winds through the Douglas County East/West Trail...
Half Marathon
NOV
7

Littleton, CO
• 26.5 miles
$17 -$85
Join us for the annual Turkey Trails 5k/10k/Half Marathon!  A fun, Thanksgiving-themed event that is perfect for the whole family. The fun includes - Great Swag - designer shirt & custom medal...
1m 5K 10K Half Marathon
49
NOV
8

Colorado Springs, CO
• 37.6 miles
$15 -$40
  The Colorado Springs Veterans Day 5K is more than a run—it’s a moving tribute to those who’ve served our country with honor. This event provides an opportunity for our community to come...
5K
23
NOV
14

Aurora, CO
• 15.9 miles
$25
Colorado State Youth XC ChampionshipsHosted by the Colorado Coyotes & Elevated Distance Training📍 Aurora Sports Park📅 Open to all athletes ages 6–14 - November 14, 2026 Join us for an exciting...
2K 3K 4K
20