Found 241 races

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OCT
18

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

Palmer Lake, CO
• 100.5 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
• 63.9 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
25

Denver, CO
• 62.0 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
• 61.6 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
• 39.6 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
• 71.2 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
• 85.8 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
• 75.5 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
• 61.7 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
• 86.2 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
• 62.2 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
• 94.4 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
• 67.3 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
• 59.9 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
14

Aurora, CO
• 77.5 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
NOV
14

Denver, CO
• 66.1 miles
$45 -$65
The 17th Annual Denver Veterans Day Run is a memorial 5K & 10K fun run to celebrate local Veterans and includes a 10K Rippetoe Ruck in honor of CPT Russell Brian Rippetoe...
5K 10K
40
NOV
14

Centennial, CO
• 75.5 miles
$30 -$45
Celebrate this Veterans Day with our annual Freedom Run! 🏃‍♂️💨 Kick off your weekend with purpose and pride by joining our 5K, 10K, or Half-Marathon. Whether you're running for a personal best or...
1m 5K 10K Half Marathon
6
NOV
15

Denver, CO
• 64.3 miles
$19 -$35
DATE: Sunday, November 15, 2026 LOCATION: Empower Field @ Mile High (1701 Bryant St. Denver CO 80204), Lot D. The start and finish lines are located west of Parking Lots D and G on Mile High...
5K
NOV
21

Denver, CO
• 67.9 miles
$30 -$50
Join us for a holiday tradition! The Pumpkin Pie 5K/10K is a flat and fast 5K and 10K held at City Park in Denver, Colorado. Start your holiday season off right with this family friendly run. All...
5K 10K
34