Colorado Run Listings

January 2018
Saturday27Jan 2018
Estes Park
Frost Giant 5K
Be prepared for any weather and trail conditions
Saturday27Jan 2018
Colorado Springs
Winter Series II
4M 8M
Sunday28Jan 2018
Morrison
Yeti Chase 5K & 10K
Mostly flat 5K course, while the 10k throws in a few rolling hills
February 2018
Saturday3Feb 2018
Colorado Springs
Nielson Challenge
A monthly 2-mile run with a cool handicap algorithm.
Saturday3Feb 2018
Westminster
Six Pack Series - Winter #3
5k
Saturday3Feb 2018
Castle Rock
Freeze Your Buns Off
3.1 miles with indoor warmup area, pancake breakfast, long sleeve shirt, and entrance into the Healthy Living Expo included.
Saturday3Feb 2018
Como
Abominable Winter Adventure Run
Expect steep inclines, deep snow, thick forests, walls and crawls, sledding sections and other challenging winter themed obstacles to overcome
Sunday4Feb 2018
Fort Collins
Fossil Creek Park 5k Tortoise & Hare
All about anyone having the same ability to win the race
Sunday4Feb 2018
Highlands Ranch
Winter Highlands Ranch Six Pack Series #3
5k
Sunday4Feb 2018
Colorado Springs
Super Half Marathon & Game Day 5K
Fundraiser for the Pikes Peak Road Runners and PikesPeakSports.us
Sunday4Feb 2018
Denver
Super Bowl 5K
Don't forgot to dress in your favorite team colors!
Sunday4Feb 2018
Littleton
Super Sunday Fun Run
Show your team spirit and wear your favorite team jersey or attire
Saturday10Feb 2018
Denver
Le Cours de L'Amour 5K/10K
5K, 10K and Kids Run
Saturday10Feb 2018
Lakewood
Mardi Crawl 1M, 5K, 10K & Half Marathon
Superior events from start to finish line
Saturday10Feb 2018
Loveland
Sweetheart Classic
4-mile race and couples race
Saturday10Feb 2018
Arvada
Heart Throb Run 5k
Are you a heart throb?
Saturday10Feb 2018
Longmont
Heart Throb Run 5k
Are you a heart throb?
Saturday10Feb 2018
Colorado Springs
Winter Series III
5M 10M
Saturday10Feb 2018
Westminster
Forty Furlongs
Warm up your winter running with this fast CMRA 5 mile (1600 rod) race
Saturday10Feb 2018
Parker
Love 'em or Leave 'em 5K 10K
Will you embrace the holiday full of heart or run from Cupid?
Sunday11Feb 2018
Littleton
Platte River 7M and 5K
Rruns on the South Platte concrete bike paths
Sunday11Feb 2018
Fort Collins
Catch Me If You Can
For this race all the ladies get a 3 minute head start
Sunday11Feb 2018
Pueblo
Valentines Twosome
Casual couples relay on a 5-km course at City Park
Sunday11Feb 2018
Lyons
Old Man Winter Rally
A fast, flat "Best of Lyons" 5.8-mile run course
Sunday11Feb 2018
Denver
Valentine's Day 5K
Denver's oldest Valentine's Day Run
Saturday17Feb 2018
Canon City
Snow Queen Frosty February 5K
Saturday17Feb 2018
Westminster
Six Pack Series - Winter #4
4M/5k
Saturday17Feb 2018
Alamosa
Racing Hearts 5k
Supports the Penguins XC and Track Club
Sunday18Feb 2018
Vail
Vail Mountain Winter Uphill Race
Takes runners, skiers, snowshoers and outdoor enthusiasts approximately 2,200 vertical feet, or two miles, up the groomed trails the top of Vail Mountain
Sunday18Feb 2018
Arvada
Ralston Creek Half Marathon & 5k
Colorado's Premier Winter Half Marathon
Sunday18Feb 2018
Highlands Ranch
Winter Highlands Ranch Six Pack Series #4
4 Mile or 5k
Saturday24Feb 2018
Littleton
Snowman Stampede
5-mile, 10-mile, kids run
Saturday24Feb 2018
Boulder
Chilly Cheeks Duathlon Series #3
Each race is comprised of approximately 4 miles of running on paved roads, bike paths, and dirt trails
Saturday24Feb 2018
Black Forest
Winter Series IV
10K 20K
Sunday25Feb 2018
Pueblo
Pueblo Marathon
Full and half
Sunday25Feb 2018
Arvada
West Side Best Side - NAAC Race
Running cross country is still cool!
March 2018
Saturday3Mar 2018
Colorado Springs
Nielson Challenge
A monthly 2-mile run with a cool handicap algorithm.
Saturday3Mar 2018
Westminster
Six Pack Series - Winter #5
5M/5k
Sunday4Mar 2018
Denver
Fight For Air Climb
Supports the mission of the American Lung Association.
Sunday4Mar 2018
Fort Collins
Lee Martinez Park 10k Tortoise & Hare
All about anyone having the same ability to win the race
Sunday4Mar 2018
Pueblo
Spring Runoff 5K 10K
5K, 10K, 10-mile, 3-mile
Sunday4Mar 2018
Highlands Ranch
Winter Highlands Ranch Six Pack Series #5
5 mile or 5k
Saturday10Mar 2018
Denver
Lucky Charm 1M, 5K, 10K
You can grab a bowl of LUCKY CHARMS at the end
Sunday11Mar 2018
Denver
Runnin' of the Green Lucky 7K
One of the largest 7K's in the United States
Saturday17Mar 2018
Highlands Ranch
St. Patrick's Day 5K
Once you finish your 5K, your first beer is on us!
Saturday17Mar 2018
Westminster
Erin Go Braugh 7.77k
Colorado's Luckiest Race!
Saturday17Mar 2018
Denver
Lucky Laces 5K/10K
5K, 10K, Little Leprechaun Fun Run
Saturday17Mar 2018
Colorado Springs
5K for St Patricks Day
First race of the Grand Prix of Running
Sunday18Mar 2018
Golden
Spring Fever 1M, 5K, 10K & Half Marathon
Superior events from start to finish line
Saturday24Mar 2018
Westminster
Six Pack Series - Winter #6
5k/10k
Sunday25Mar 2018
Highlands Ranch
Winter Highlands Ranch Six Pack Series #6
5k or 10k
Sunday25Mar 2018
Fort Collins
Spring Equinox Half Marathon
Half Marathon and 4-Mile
Saturday31Mar 2018
Lamar
Dust Bowl Series - Day 4
Do any one day or all 5 days
Saturday31Mar 2018
Denver
Hippity Hop Easter Trot 5K/10K & Kid's Cottontail Fun Run
1 Mile, 5K, 10K, 10M or Half Marathon and bring the kids along for the Kid's Cottontail Fun Run
Saturday31Mar 2018
Denver
Hoppin' Half
A great way to celebrate Spring and enjoy one of the best parks in the city
April 2018
Sunday1Apr 2018
Colorado Springs
Hams and Hamstrings® 5K
Colorado's Easter Sunday 5K - every finisher gets a free mini Easter Ham
Sunday1Apr 2018
Fort Collins
Cottonwood Glen Park 12k Tortoise & Hare
All about anyone having the same ability to win the race
Saturday7Apr 2018
Colorado Springs
Nielson Challenge
A monthly 2-mile run with a cool handicap algorithm.
Saturday7Apr 2018
Pueblo West
Baylon Michael Meyer 5K/10K Memorial Run/Walk
Providing scholarships to Pueblo District 70 high school seniors
Saturday7Apr 2018
Westminster
Bobcat Boogie
5K Run/Walk and 1 Mile Foxtrot Fun Run
Sunday8Apr 2018
Arvada
Spring Fling Prairie Dog Half,10k,5k
Prairie Dog Half Series
Sunday8Apr 2018
Littleton
Platte River Half Marathon & Relay
Enjoy the best post-race party in Colorado
Sunday8Apr 2018
Colorado Springs
Purple Run
This event is a fundraiser for those individuals with pancreatic cancer.
Sunday8Apr 2018
Littleton
West Side Best Side - Fehringer Ranch Race
Running cross country is still cool!
Sunday8Apr 2018
Colorado Springs
XTERRA Cheyenne Mountain State Park 5K/12K/24K
Open to runners of all ages and skill levels.
Saturday14Apr 2018
Colorado Springs
Rattler Trail Race
50k, 25k, and 10k
Saturday14Apr 2018
Colorado Springs
Tortoise and Hare
A unique handicap race based on age, weight, height and gender
Saturday14Apr 2018
Westminster
Beat the Heat 1M, 5K, 10K, Half & Full Marathon
Superior events from start to finish line
Sunday15Apr 2018
Fort Collins
Horsetooth Half Marathon
Surprisingly fast course, with a net loss in elevation
Saturday28Apr 2018
Westminster
Westminster Trail Half Marathon/10K/5K
Marathon, 10K, and 5K
Saturday28Apr 2018
Colorado Springs
Cheyenne Mountain Trail Race
10K, 25K, 50K
May 2018
Saturday5May 2018
Larkspur
Greenland Trail 50K
50K, 25K, 8M, 4M
Saturday5May 2018
Colorado Springs
Reebok Spartan Super 8-10 miles
Saturday5May 2018
Colorado Springs
Nielson Challenge
A monthly 2-mile run with a cool handicap algorithm.
Saturday5May 2018
Berthoud
Bob Turner Classic
5K Fun Run/Walk
Saturday5May 2018
Castle Rock
Cinco de Mayo Trail Run
Twisty trails to shaded beauty, this trail has it all
Sunday6May 2018
Colorado Springs
Reebok Spartan Sprint 3-5 miles
Saturday12May 2018
Colorado Springs
Women's Distance Festival 5K
Supporting Girls on the Run
Sunday13May 2018
Westminster
Colorado Women's Classic
10-miler, 10K, 5K, Kids Run
Sunday13May 2018
Boulder
Mermaid Run Boulder
A day to run, walk, skip or jog and celebrate with the entire family
Sunday13May 2018
Denver
Mother's Day 5K & Brunch
We Run Mother's Day!
Sunday20May 2018
Castle Rock
Tri the Rock Kid's Triathlon
All you have to do is try!
Monday28May 2018
Boulder
Bolder Boulder
America's All Time Best 10K
June 2018
Saturday2Jun 2018
Palmer Lake
Palmer Lake Half Marathon and 10K
Can you say, "Wide Open Spaces.."
Saturday2Jun 2018
Colorado Springs
Nielson Challenge
A monthly 2-mile run with a cool handicap algorithm.
Saturday2Jun 2018
Frisco
Run the Rockies Road Race
10K and Half Marathon along the Ten Mile Range on the paved recreation path
Sunday3Jun 2018
Louisville
Skirt Sports 13er
13er, 10k, 5k
Saturday9Jun 2018
Durango
Steamworks Half Marathon
One of Durango's favorite races
Saturday9Jun 2018
Fairplay
South Park Trail Marathon and Half
The South Park Marathon and Half are among the highest in Colorado
Saturday9Jun 2018
Colorado Springs
Colorado Springs Heart & Stroke Walk
Building healthier lives, free of cardiovascular diseases and stroke
Saturday9Jun 2018
Denver
Denver Heart and Stroke Walk
5K or 1 Mile Option
Thursday14Jun 2018
Westminster
Six Pack Series - Summer-Fall #1
#RaceMyPace
Saturday16Jun 2018
Arvada
Summer Breeze 1M, 5K, 10K & Half Marathon
Superior events from start to finish
Saturday16Jun 2018
Leadville
Trail Marathon & Heavy Half
Run through the historic mining district's challenging old mining roads and trails, and hit a high of 13,185 feet
Saturday16Jun 2018
Eagle
Eagle Half Marathon and 10K
If you love to take pictures why you run/race then get your camera out, because you won't want to miss these mountain views
Sunday17Jun 2018
Arvada
Father's Day Classic
Come to race and stay for the FREE Father's Day Car Show
Sunday17Jun 2018
Denver
Fathers Day 5K/10K
Celebrate your Father, Brother, Son, Uncle, Grandfather, Husband or Friend with a great run or walk
Saturday23Jun 2018
Castle Rock
Castle Rock Half Marathon
Half marathon, 5-mile, rock challenge
Saturday23Jun 2018
Highlands Ranch
Mountain Ridge Trail Half Marathon and 10K
Formerly known as the "East-West" trail race
Tuesday26Jun 2018
Frisco
Frisco Mountain Goat Kids Trail Running Series #1
Series of four kids trail running races over the summer
Thursday28Jun 2018
Westminster
Six Pack Series - Summer-Fall #2
#RaceMyPace
July 2018
Wednesday4Jul 2018
Longmont
Longmont Half and 5k
Part of the hometown race series.
Wednesday4Jul 2018
Breckenridge
Independence Day 10K Trail Run
Some of the best views in the Breckenridge area
Wednesday4Jul 2018
Fort Collins
FireKracker 5k
Scenic, flat and fast course in City Park
Wednesday4Jul 2018
Northglenn
Firecrackers & Flapjacks 4 Mile Run
Join us for a 4 Mile Run before enjoying pancakes in the park
Wednesday4Jul 2018
Louisville
Let Freedom Run
5K, 10K, Kids Run
Saturday7Jul 2018
Colorado Springs
Nielson Challenge
A monthly 2-mile run with a cool handicap algorithm.
Sunday8Jul 2018
Colorado Springs
USATri60
Indoor triathlon
Tuesday10Jul 2018
Frisco
Frisco Mountain Goat Kids Trail Running Series #2
Series of four kids trail running races over the summer
Thursday12Jul 2018
Westminster
Six Pack Series - Summer-Fall #3
#RaceMyPace
Saturday14Jul 2018
Denver
Sand Creek Half Marathon
Also 5K and 10K
Saturday14Jul 2018
Frisco
Frisco Triathlon
Featuring stand-up-paddle boarding, mountain biking and trail running
Sunday15Jul 2018
Colorado Springs
USATri60
Indoor triathlon
Saturday21Jul 2018
Castle Rock
Prairie Dog Half, 5K, and 10K
5K 10K Half Marathon
Saturday21Jul 2018
Westminster
Dog Days 1M, 5K, 10K & Half Marathon
Superior events from start to finish
Saturday21Jul 2018
Palmer Lake
Kickers For Kids Fun Run
5K / 10K / 13.1 / 26.2 / 50K / 50 Miler
Sunday22Jul 2018
Golden
Black Hawk Trail Half Marathon, and 10K
If you are looking for one of the best "hill" courses the ERS has to offer, than look no further
Tuesday24Jul 2018
Frisco
Frisco Mountain Goat Kids Trail Running Series #3
Series of four kids trail running races over the summer
Thursday26Jul 2018
Westminster
Six Pack Series - Summer-Fall #4
#RaceMyPace
August 2018
Saturday4Aug 2018
Colorado Springs
Nielson Challenge
A monthly 2-mile run with a cool handicap algorithm.
Saturday4Aug 2018
Colorado Springs
Hears 5K Experience
Tuesday7Aug 2018
Frisco
Frisco Mountain Goat Kids Trail Running Series #4
Series of four kids trail running races over the summer
Thursday9Aug 2018
Westminster
Six Pack Series - Summer-Fall #5
#RaceMyPace
Saturday11Aug 2018
Estes Park
Rocky Mountain Half
#RMHalf
Saturday11Aug 2018
Westminster
Holy Cow Trail Stampede 5k/10k
Trail Stampede!
Sunday19Aug 2018
Denver
Dog Days of Summer
5K/10K & 1 Mile Doggy Dash
Thursday23Aug 2018
Westminster
Six Pack Series - Summer-Fall #6
#RaceMyPace
Saturday25Aug 2018
Arvada
Runapalooza 1M, 5K, 10K & Half Marathon
Superior events from start to finish
Sunday26Aug 2018
Erie
Erie Half Marathon and 5K
Bring 5 non-perishable items on race day and get entered into the race-day raffle.
September 2018
Saturday1Sep 2018
Colorado Springs
Nielson Challenge
A monthly 2-mile run with a cool handicap algorithm.
Saturday1Sep 2018
Fountain
Start It Off 5k Color Run
A fun 5k color run to start off the festivities for the Labor Day weekend
Sunday2Sep 2018
Colorado Springs
Cheap 5K
Celebrate cheap Americana - and eat pancakes!
Saturday8Sep 2018
Denver
The Denver 5k
Fun, flat and fast around beautiful Sloan's Lake!
Sunday9Sep 2018
Arvada
Arvada Harvest Half Marathon
Half Marathon, 5K/10K/10M
Saturday22Sep 2018
Westminster
Fallfest 1M, 5K, 10K,Half Marathon, & Marathon
Superior events from start to finish line
Saturday22Sep 2018
Westminster
The Pioneer Prairie Dog Half, 10k & 5k
Prairie Dog Half Series
Sunday23Sep 2018
Golden
XTERRA Golden Gate Canyon
This course best exemplifies the spirit of the XTERRA Trail Run offering a 7k and 20K distances
Saturday29Sep 2018
Colorado Springs
Colorado Springs Marathon
Full, half, 5K, Kids K
Saturday29Sep 2018
Durango
Horse Gulch Hustle Trail Run
Tackle thirteen miles of rocky, rugged trail in Durango's renowned Horse Gulch
Saturday29Sep 2018
Durango
Durango Double Half Trail Marathon
Benefits the Women's Resource Center
October 2018
Saturday6Oct 2018
Colorado Springs
Nielson Challenge
A monthly 2-mile run with a cool handicap algorithm.
Saturday6Oct 2018
Castle Rock
Ridgeline Trail Race
Ridgeline Trail 50K, Marathon, Half Marathon and 10K - LiveBIG 5K and Family Adventure Race
Saturday6Oct 2018
Denver
Color Me Rad
We're the only 5K that will send you running through RAD color stations
Sunday7Oct 2018
Boulder
Boulder Rez Marathon
Boulder's biggest marathon
Sunday7Oct 2018
Louisville
Louisville Trail Half Marathon
This Flat and Fast Course is sure to be a a PR breaker
Sunday7Oct 2018
Westminster
Costumed K9 Canter & 1 Mile Fun Run
Come show off your dog and his costume!
Saturday27Oct 2018
Denver
Pumpkin Smash and Dash 5K/10K
Get halloween weekend off to a great start with a little cardio and then some pumpkin carving, vendor trick or treats, costume contests, music, youth activities and much, much more
Sunday28Oct 2018
Westminster
Westy Half and 5k
Walkers and Runners of all abilities welcome
Sunday28Oct 2018
Golden
Kooky-Spooky 1M, 5K, 10K, & Half Marathon
Superior events from start to finish
November 2018
Saturday3Nov 2018
Colorado Springs
Nielson Challenge
A monthly 2-mile run with a cool handicap algorithm.
Thursday22Nov 2018
Parker
Parker Turkey Day 5k
Thursday22Nov 2018
Erie
The Pilgrimage Run
Join us on Thanksgiving Day - It's not about turkey!
December 2018
Saturday1Dec 2018
Boulder
Colder Bolder
This 5K is a little different, but so are those of us who enjoy running in the cold
Saturday1Dec 2018
Colorado Springs
Nielson Challenge
A monthly 2-mile run with a cool handicap algorithm.
January 2019
Saturday5Jan 2019
Colorado Springs
Nielson Challenge
A monthly 2-mile run with a cool handicap algorithm.