Found 99 races near Weld County, CO

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AUG
8

Thornton, CO
• 20.8 miles
$17 -$48
Join us for the annual Summer Sizzler 5k/10k/15k!  A fun summer event that is perfect for the whole family. The fun includes - Great Swag - designer shirt & custom medal Chip-timing with live...
1m 5K 10K 15K
286
AUG
11

Bellvue, CO
• 36.4 miles
$25 -$30
Join us August 5, 12, 19 & 26 for a fun series of shorter midweek trail races. Our goal is to offer a fun, low-key series of races designed to give newer trail runners an opportunity to dip their...
10K
20
AUG
15

Longmont, CO
• 42.5 miles
$10 -$40
The Sunrise Stampede 5K and 1-Mile Fun Run/Walk is a community celebration that brings together neighbors, schools, students, families, educators, local businesses, and supporters from across St....
1m 5K
4
AUG
16

Erie, CO
• 24.4 miles
$45 -$85
5K road featuring competitive racing and community celebration
5K Half Marathon
129
AUG
18

Bellvue, CO
• 36.4 miles
$25 -$30
Join us August 5, 12, 19 & 26 for a fun series of shorter midweek trail races. Our goal is to offer a fun, low-key series of races designed to give newer trail runners an opportunity to dip their...
5K
24
AUG
22

Westminster, CO
• 54.2 miles
$45 -$55
Now in its 28th year, the Jog in the Bog 5K is a fun opportunity to get active while supporting SLHS.    Registration includes a commemorative t-shirt, goodie bag, entry into prize drawing, and...
5K
AUG
23

Westminster, CO
• 12.9 miles
$40 -$95
Welcome to the Pioneer Prairie Dog Half Marathon event; the one that started the series! With 10k and 5k events too!  Everyone is back to school and slipping into a routine.  Make this your...
5K 10K Half Marathon
271
AUG
25

Bellvue, CO
• 36.4 miles
$25 -$30
Join us August 5, 12, 19 & 26 for a fun series of shorter midweek trail races. This fourth race of the series will take place on the fast and flat Valley Trail at Lory State Park. Our goal is to...
12K
24
SEP
5

Brighton, CO
• 43.8 miles
$55 -$150
Introducing the Raising the Barr Ultra Race.  Try to finish as many 10 mile loops around the lake in the first 4 or 10 hours and then switch to 1 mile loops for the last few hours of your race....
8
SEP
7

Loveland, CO
• 33.2 miles
$65
See the Northern Colorado All-Ability communities come together in faith and sports through FCA All-Abilities. We are running for: Awareness of sports programs for all ages for individuals with...
5K
4
SEP
7

Loveland, CO
• 33.8 miles
$10 -$65
Join us for the Labor Day 5kSee the Northern Colorado All-Ability communities come together in faith and sports through FCA All-Abilities. We are running for: Uniting All-Abilities through faith...
5K
2
SEP
10

Greeley, CO
• 15.3 miles
$15 -$45
✨🦸 Welcome to the 14th Annual Superhero Run! 🦸✨ This isn’t just a race - it’s a chance to make an impact by stepping up for others. On Saturday, September 19, 2026, we’ll be back at Greeley’s...
1m 5K 10K
9
SEP
12

Bellvue, CO
• 36.4 miles
$110 -$125
The Black Squirrel Half Marathon will take place on the wonderful trails of Lory State Park to the northeast of Fort Collins, Colorado. The half marathon course offers a tour of the outer...
Half Marathon
29
SEP
12

Greeley, CO
• 18.9 miles
$35 -$45
Join us for the For the City Network 5K, a community run/walk dedicated to strengthening neighborhoods, supporting families, and creating positive change across Weld County. This event is open to...
5K
20
SEP
12

Loveland, CO
• 28.6 miles
$5 -$15
Come join us for a 1-mile fun run, as we kick off the Wild Wonderful Saturday events. Plan to stay and check out the Wild Zone. Welcome adventurers, explorers, and vine-swinging daredevils! You...
4
SEP
13

Loveland, CO
• 33.6 miles
$15 -$30
Are you ready to challenge yourself? We will have a 1-mile loop open for 1 ½ hrs. Who can run the most loops in 1 ½ hrs? Who can run the fastest? We will have awards for different categories....
24
SEP
13

Thornton, CO
• 53.1 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 10km race uses a handicap...
5K 10K
54
SEP
18

Severance, CO
• 19.7 miles
$35 -$45
Unique nighttime glow-themed 5K run/walk in Severance, CO during Severance Days festival. Professionally timed with DJ entertainment and post-race party.
5K
269
SEP
19

Westminster, CO
• 12.1 miles
$25 -$85
One of Colorado's favorite trails meets one of its most glorious parks at our 9th annual Fallfest! As courses wind southwest along Big Dry Creek Trail, the remarkable sight of Standley Lake with...
5K 10K Half Marathon
305
SEP
19

Buena Vista, CO
• 26.6 miles
$30 -$100
Annual run in Buena Vista with supportive community atmosphere and race day excitement
5K 10K Half Marathon
264