Found 176 races

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

OCT
17

Denver, CO
• 17.1 miles
$30
Participants joining our inaugural annual 5K and Family Run/Walk will help bring awareness for clean, sustainable water solutions to communities in need and support our disaster response...
5K
4
OCT
17

Lakewood, CO
• 11.9 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
67
OCT
18

Denver, CO
• 13.9 miles
10K Half Marathon
41
OCT
18

Palmer Lake, CO
• 29.0 miles
$15 -$45
A .5K fun run, walk or crawl benefiting Awake Palmer Lake.
5K
7
OCT
24

Arvada, CO
• 21.8 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
18
OCT
25

Denver, CO
• 14.5 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
54
OCT
25

Denver, CO
• 13.8 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
85
OCT
31

Idaho Springs, CO
• 31.8 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
14
OCT
31

Thornton, CO
• 23.5 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
17
NOV
1

Denver, CO
• 14.6 miles
$10 -$45
10K/5K run in Denver benefiting anti-human-trafficking nonprofits.
5K 10K
13
NOV
1

Denver, CO
• 14.0 miles
$10 -$15
Rocky Mountain Road Runners holds a monthly Trophy Series in the Denver area.  We provide a low-key, low-cost racing environment. Everyone is welcome to run with us! The 15km race uses a handicap...
5K 15K
42
NOV
7

Denver, CO
• 14.3 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
53
NOV
7

Lone Tree, CO
• 3.5 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
8
NOV
8

Colorado Springs, CO
• 49.4 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
30
NOV
14

Aurora, CO
• 18.0 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
26
NOV
14

Denver, CO
• 15.0 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
46
NOV
15

Denver, CO
• 14.4 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
3
NOV
21

Denver, CO
• 14.5 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
37
NOV
26

Louisville, CO
• 20.8 miles
$20 -$40
Thanksgiving morning family fun run in Old Town Louisville, CO benefiting Community Food Share.
65
NOV
26

Broomfield, CO
• 15.7 miles
$17 -$69
WELCOME TO YOUR FAMILY'S THANKSGIVING DAY TRADITION Welcoming all runners, walkers, and pumpkin pie eaters alike!This fall event is fun for the whole family.Youth and team pricing is available!...
2m 5K 10K
75