Event details subject to change. Please confirm all information via event website.
Tiger Prowl 5K
The Tiger Prowl 5K is a fabulous annual community event and tradition run by the Lakewood High School Foundation to support all the talented and ambitious student programs offered. All […]
Springs Kids Triathlon
A kids Triathlon for kids aged 6-14 years old. Its a fun and simple event for kids that consists of swimming in a pool, biking on a trail and then […]
FalconTri
Welcome to our first-ever FalconTri! Hosted by the U.S. Air Force Academy's Triathlon Club's cadets, this race features a super sprint triathlon (300m pool swim, 5k bike, 1k run) around […]
Canceled Flying Falcon Downhill Mile
Looking to run the fastest mile you possibly can? Dropping 220 feet, the Flying Falcon Downhill Mile will allow you to run the absolute fastest mile possible. Taking place on […]
Run Rabbit Run Ultra
The Run Rabbit Run courses are very much like life, in that there are many, many little and not so little ups and downs in between the obvious highs and […]
Break of Dawn Trail Race
Be part of BeyondHome's first trail race at North Table Mountain! This scenic and challenging 8.6-mile race supports BeyondHome in helping families build stable, self-sufficient futures through housing, education, and […]
Pikes Peak Ascent
The Pikes Peak Marathon, founded in 1956, is the oldest continually held marathon in the United States, taking runners from Manitou Springs, Colorado, to the summit of Pikes Peak at […]
Marine Memorial 5K
The Marine Memorial 5K benefits the United States Marine Corps Memorial and helps us maintain the flags, lights, and physical aspects of the site. Your help is greatly appreciated to […]
Run the Rockies Half Marathon
The Run the Rockies Road 10k and Half Marathon will feature the traditional Run the Rockies Road Race course with runners starting near Copper Mountain; runners will follow the paved […]
All-Out Fallfest
One of Colorado's favorite trails meets one of its most glorious parks at our 9th annual Fallfest 5K, 10K and half marathon! As the courses wind southwest along Big Dry […]
Ouray Mountain Trail Run
Thank you for your interest in joining us for this fantastic 13-mile run in the mountains of Ouray. You will be challenged but also enthralled by the incredible views and […]
Wolf Creek Wrangle
Take a step back in time and run or hike where the settlers of the west once walked! These trail runs are hosted by the historic Eaton's Ranch, the country's […]
Battle by the Brook
The 9th Annual Battle by the Brook Adventure Race will be held on September 19th, 2026 at Camp Shady Brook, in Deckers, CO. This is our favorite fundraiser! With your […]
Stride for Hope 5K
Did you know September is Childhood Cancer Awareness Month? Join Confluence Run/Walk Club on Saturday, September 19th, 2026 for the Stride for Hope 5K & Kids Fun Run—a high-energy, family-friendly […]
Blisters & Brews 5K
Blisters & Brews is a 5k Fundraiser Race on the morning of Saturday, September 14, giving Festival attendees the opportunity to exercise before the Festival. Presented by the Telluride Blues […]
Beulah Challenge
Due to the Aspen Acres Fire, the half marathon had been cancelled in 2026. The Beulah Challenge, which started in 1996, is a 5K, 10K, and half-marathon run near Beulah, a small […]
Champions for Children 5K
Lace up for a race that truly matters. We are thrilled to extend a special invitation to the Colorado running community for the 3rd Annual Champions for Children Charity 5K […]
STAR Foundation 5K
Enjoy warm late-summer sunshine as you run through the welcoming streets of Wellington, Colorado. With wide-open views, small-town charm, and community cheer along the course, this race is perfect for […]
Montbello Alive! 5K
Join us for the Montbello Alive 5K, a vibrant community event that brings together runners, walkers, and families for a day of fun, wellness, and celebration. This race is part […]
Walk With Autism
Come join us for a fantastic day to celebrate inclusion and community! We welcome all levels of participants and we welcome all people- this is a no sorry zone. This […]
Lederhosen Run
The Tavern at Red Feather Lakes is planning this year's Oktoberfest on Saturday, September 19th. As a part of the festivities, Caring Hearts of Red Feather Lakes Foundation is putting […]
Fall Equinox Half Marathon
Held on the Autumnal Equinox during the height of fall color, the Equinox Marathon, Half Marathon and 5-miles races are all point-to-point, net downhill, scenic courses along the Cache La Poudre River in Fort Collins. This year, the event will take place on September 18th.
Pikes Peak Marathon
The Pikes Peak Marathon, founded in 1956, is the oldest continually held marathon in the United States, taking runners from Manitou Springs, Colorado, to the summit of Pikes Peak at […]
Oktoberfest Triathlon
The annual Oktoberfest Triathlon on Saturday September 24th, 2022, is the party of the season and also a 2022 Mountain Collegiate Conference Race! As the leaves change color this race […]
Second Wind Fund 5K
Youth across Colorado are facing growing mental health challenges, and more than ever, they’re reaching out for support. Second Wind Fund is here to answer that call, connecting youth at […]
Golden Gallop 5K/10K
“Howdy Folks! Welcome to Golden, where the west RUNS!” Starting beneath the City’s famous ‘Welcome’ arch, right in the center of historic downtown Golden, and finishing in Parfet Park beside […]
Chile & Frijole Hot to Trot
The Chile & Frijole Hot to Trot Race will be held on the last day of the Pueblo Chile & Frijoles Festival. The festival features live entertainment, street vendors, cooking competitions, […]
Connection 5K
True Nature is hosting the first Connection 5K on September 20th at 8:00am to raise awareness and support for Connection is the Medicine Foundation. The run will start and finish […]
Expo Park XC Runs
Old-school cross-country style courses with creek crossings and bale jumps. Youth races 1k - 4k. All-ages 5k. Individuals and teams.
Farmers 5000
The Farmers 5000 is likely one of the very first school-based 5K fundraisers in the state of Colorado. Since 1981, serious racers and weekend warriors alike have been coming to […]
Please click here to submit your event for FREE to our online calendar.
We do not allow events without physical locations (IE – virtual runs, runs with locations TBD, etc…).
Please allow 48 hours after submission for an event to appear on the calendar. If you have already listed your event and would like us to update it, please contact us.