Equinox Half Marathon

Sparge Brewing 3999 GW Bush Avenue Unit 101, Wellington, CO, United States

Both races start & finish at Sparge Brewing in Wellington 3999 GW Bush Unit 101, Wellington, CO 80549   4-Mile course is a square loop around the brewery on paved county roads. Half Marathon course runs on a mix (50/50) of paved & dirt country roads.

Central Park 5K

Stapleton Central Park 8801 Martin Luther King Jr Blvd, Denver, CO, United States

Is it spring or still winter? We'll know when we run the Central Park 5k at the end of March! Celebrate the end of winter with us on this flat and fast course in the historic Central Park neighborhood!

Eggstravaganza Challenge 5K

Founders Park 4671 Enderud Blvd, Castle Rock, CO, United States

The 5k Course will start at Founders Park in beautiful Castle Rock, CO and connect to the Mitchell Creek Trail. The course is mainly flat, and well marked. Water stops will be at the 5K turnaround. All proceeds from the race will be donated to The Juvenile Diabetes Research Foundation, an organization that invests in […]

$55.00

Ram Run 5K

Green Mountain High School 13175 West Green Mountain Dr, Lakewood, CO, United States

This is a community 5k that is a fundraiser for Green Mountain High School and GMHS Cross Country. This race will include 2 water aid stations that will be run by the GMHS Theatre department and GMHS Ram Band. At the end of the race, Coyote Table will be vending, and with registration comes a […]

Most Eggcellent 5K

McPhelemy Park 112 W Lake St, Buena Vista, CO, United States

This is the Most Eggcellent of excellent 5Ks - an 80s themed 5k!  Bring out your pastel, your shoulder pads, your blue eyeshadow, and that big hair!  We cannot wait to see your spirit!   We will start at McPhelemy Park, and then runners will travel west on Crossman Avenue (CR 350).  They will take a […]

CSU Grit Run 5K

Colorado State University Fort Collins, CO, United States

ome join us on April 20th at 9:30am for a 5K run/walk hosted by the Colorado State Football Program! Colorado State Football would like to invite you to participate in an event that will benefit  those with Cystic Fibrosis. Cystic Fibrosis is a progressive, genetic disease that causes persistent lung infections and limits the ability […]

Couch to 5K Trail Running Program

Ken Caryl Ranch 7676 S Continental Dr, Littleton, CO, United States

Have you always wanted to run a 5k? Do you love hiking and being in the outdoors?  Join this 6 week program with Life's 2 Short Fitness for Colorado women looking for support and community to train for their first 5k (race or adventure) ON THE TRAILS!  Includes weekly coached runs at different beginner friendly […]

$189.00

Run the Ranch Trail Runs

Sylvan Dale Guest Ranch 2939 N CR 31D, Loveland, CO, United States

For the 5th year running and benefiting the Heart J organization, we are bringing back an amazing and beautiful trail race to Loveland, CO. You will have 6 distances to choose from. Come run on beautiful trails on private land at Sylvan Dale Guest Ranch. The views alone are to die for! There are different […]

5K Raptor Run

Barr Lake State Park 13401 Piccadilly Road, Brighton, CO, United States

Please come run/walk, being your dog too if you want at Barr Lake State Park Have fun! Bring a friend. Sign up on Running Guru or go to Friends of Barr Lake website.

$35.00 – $40.00

PPRR Nielson Challenge

North Monument Valley Park 1794 Culebra Ave., Colorado Springs, CO, United States

Race Format The first time you run this event, you'll establish a base time for yourself. This base time is used to generate a handicap time. The handicap time is calculated using an algorithm developed by Bob Royse, and it's geared to favor a beginning runner and the slower runners. Click here for an explanation of the […]

Baylon Michael Meyer 5K/10K

Pueblo West Pool 362 East Hahns Peak Ave., Pueblo West, CO, United States

Memorial 5K/10K race providing scholarships to Pueblo District 70 high school seniors in honor of Baylon Michael Meyer.

Zuni St Brew 5K

Zuni Street Brewing Company 2355 West 29th Avenue, #Suite 1300, Denver, CO, United States

Join us for the Zuni Street Brewing 5k on April 6, 2024, for a 5k-ish, fun run event that starts and ends at this awesome taproom in Denver. Run, walk, jog - whatever goes! Complete the course and celebrate with us and a FREE, local craft brew at the finish line. Start windows will be […]

Three Creeks Half Marathon

Cherry Creek State Park 4201 S Parker Rd, Aurora, CO, United States

Racing Underground brings you an amazing half marathon this spring! The Three Creeks Half Marathon features a USA Track & Field certified half marathon course that is flat, fast and scenic! Travel on foot through some of the most beautiful parts of Cherry Creek State Park, with a total combined elevation gain of only 253 […]

RMRR City Park 4M

City Park - Denver 1700 N York St, Denver, CO, United States

Everyone – slow, fast, or in-between –  can win  at RMRR Trophy Series races.  With our handicap scoring system, we predict YOUR finish time based on recent running results, giving you a great goal to shoot for whatever your speed.  Just show up an hour before the start and we’ll get you ready for your race.  It’s an […]

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