RMRR’s Marathon Training Series provides 10M and 20M races that are low cost, friendly, fully supported, and officially timed.  All you need to do is focus on your running!  Our races fit perfectly in training schedules for Colfax, Boston, New York, Chicago, and other full and half marathons. Everyone is welcome at our MTS races:  RMRR members, […]

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 14,115 feet, and back down for a total of 26.2 grueling mountain miles. It and its sister race, the Pikes Peak Ascent, each climb about […]

“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 gushing Clear Creek, the Golden Gallop will lead its runners on 5k and 10k loops. The Golden Gallop is the annual fundraiser for the Golden […]

It is more important than ever to invest in the mental health of our children and teens, many of whom have undergone significant changes to their daily lives and have experienced increased levels of anxiety, stress, and feelings of disconnectedness over the past few years. Demand for Second Wind Fund's life-saving services continues to increase. […]

Raise awareness for ovarian cancer and raise funds to support Coloradans with 7 different types of gynecologic cancers: Ovarian, fallopian tube, uterine/endometrial, cervical, vaginal, vulvar and peritoneal cancers. This event benefits Sue Gift - Gynecologic Cancer Support.

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 Wheat Ridge High School to run the Farmers 5000! Starting and finishing in front of the school, this race winds through the surrounding neighborhoods making […]

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 proceeds go back into Lakewood High School programs for the students including theater, musical performance groups, athletics and the many other LHS clubs. ​Donations to […]

The Race Against Suicide is an annual memorial and fundraising event for Pikes Peak Suicide Prevention. Participate in our 3k walk or 5k run individually or with a team in order to raise funds to continue to support our community outreach programs and education. This event will be available both in-person and virtually. Suicide is […]

Paul’s Mystery Ship To End ALS launched in 2020 following Paul Dannels battle with ALS, a disease causing profound physical changes for individuals and families. Our foundation brings hope amid the storm of ALS, supporting research for a cure and providing aid to those affected. We offer essential equipment, scholarships for students impacted by ALS […]

The popular trail running series in Bear Creek Lake Park takes place weekly in September. Different routes allow participants to explore all areas of the park. Racers can compete against others in-person on Wednesday evenings, or run the marked course on their own Tuesday-Thursday weekly for a virtual option.

Crested Butte is known for having some of the best trails in the country. Runners will be challenged by this high altitude course. Its wide open views will amaze runners as they traverse through the Gunnison National Forest.  At the lower elevations, stunning wildflowers set against mountain backdrops will greet runners as they work their […]

Announcement: All Course Profiles and GPX files are released on the race website! Come join us to run through a magical part of history in the Cuchara Valley. The Spanish Peaks of Southern Colorado have been among the most important landmarks of the southwestern United States, guiding Native American tribes, Spanish and French trappers, gold […]

With glorious views of the Collegiate Peaks and 4,000ft of ascent along the way, these 30 miles of buttery single track and forest roads in the heart of the valley are perfect for everyone from the first time 50k’er to the veteran trail runner. Join the fun on September 25th in Buena Vista, CO.

We are thankful to be hosted by Vail Ski Resort for our start and Town of Minturn for our finish for the inaugural Cougar Ridge Classic 26K trail race. The course is a point-to-point race, starting at Lionshead Village in Vail and finishing in the Town of Minturn.

Register for Nebraska’s Most Beautiful Race - the Monument Marathon, Half Marathon and 5K on September 24th in Gering, just two hours from Fort Collins. Experience towering natural landmarks, pine-covered hills, rugged badlands, and a rural landscape that provides a stunning and tranquil experience. Run along part of the Oregon Trail, the course traverses through Mitchell Pass and around Scotts Bluff National Monument.

Get out to enjoy the crisp autumn air at the Pioneer Prairie Dog Half & 5k/10k! We will be celebrating autumn at the Start/Finish line located at the beautiful Westminster Promenade Terrace. Each participant will receive a Gender Specific Tech Tee to commemorate the day and half marathoners will receive a Finisher Medal! Stick around […]

13.1 mile trail race with nearly 1000 ft of elevation gain from Snowmass to Aspen

Lisa Nelson's Annual Mustang Stampede 5K Memorial Scholarship Run/Walk in memory of Lisa Nelson, a beloved faculty member of Ralston Valley High School. Lisa passed away from cervical cancer in March 2013.  The purpose of this 5K Run/Walk is to unify the local community in commeration of her life and raise funds for a college […]

The Mountain Chile Cha Cha Trail Race offers a 5K and 10k race. The races begin just outside downtown Pagosa Springs, CO, on Reservoir River Ranch, where you'll run on jeep and ATV trails and enjoy breathtaking views of the San Juan Mountains. The course offers varied terrains - fast flats, moderate slow hill climbs, […]

24 Hours of Palmer Lake is back! This race features 24 hours of a gorgeous 0.82 mile loop course surrounded by mountains on top of the Palmer Divide at an Elevation of 7,240 Feet. This is a low fanfare community-driven event, simply geared towards those who love to push their mental and physical limits while […]

Being part of a Get Your Rear in Gear event means joining North America’s largest grassroots movement in the fight against colorectal cancer. Your actions and voice have the power to change the lives of local patients, survivors, and caregivers!

Enjoy a beautiful, fun 5k after watching the sheep come through town, and the parade. We will start at the end of the parade on Mill Street and end at Eagle Park! Timing is variable since the sheep march to the beat of their own drum, but the tentative start time is 10:30am. Come experience […]

The Montrose Recreation Foundation proudly presents the  22nd Annual Black Canyon Triathlon will be held Saturday, September 30, 2023. This event attracts about 200 athletes and their families annually to Montrose. It is a well supported sprint distance triathlon. There are individual youth and adult divisions, plus adult and youth teams(2 or 3 members). We […]

Fruita Fall Festival - Mesa County Search & Rescue 5K Race HOSTED BY MESA COUNTY SEARCH AND RESCUE SUPPORT OUR MISSION TO RESCUE AND SAVE LIVES EARLY REGISTATION $35 / REGISTRATION AFTER SEP 1 st $50 WHAT: Annual 5k race. Prizes for first and second place winners in each category. Enjoyment for ALL! Racers can […]

Elevation Everest is a race series held at Winter Park Resort in Colorado that offers hiking/trail running events centered around one goal: elevation gain. Choose to race solo or make a relay team to divide and conquer the total elevation gain. Athletes race up the mountain, ride the gondola down, and do it all again […]

If you've ever wanted to run on an airport, this is your chance! Angel Flight West is proud to present the Run for the Angels 5k! Angel Flight West is a nonprofit, volunteer-driven organization that arranges free, non-emergency air travel for children and adults with serious medical conditions and other compelling needs. Our network of […]

The True Grit Run meanders through the forest at the base of the San Juan Mountain where True Grit was filmed. The courses run on single track trails and fire roads on five private ranches only accessible by participating in this event. The spectacular scenery includes views of the San Juan Mountains, the True Grit […]

With the Fall Season, Estes Park shines in colors and wilderness experiences! Herds of Elk begin to roam the meadows and open fields; while sounds of bugling Bull Elk call out their territory. Join us as we acknowledge this unique season at the RUT RUN 5K as part of ‘ELK FEST’. Kick starting the weekend of […]

This races offers two distances on Emerald Mountain, 12k (ends up being closer to 7.75 miles long) and a 4 mile run. This scenic course will begin at the base of Howelsen Hill and tour Emerald Mountain through aspen lined single track. Hikers are welcomed in the 12k. This race is a fundraiser for Northwest […]

Put on your lederhosen and sneakers as we kick-start the annual Highlands Ranch Community Association's Oktoberfest event in Town Center with the Oktoberfest 5K! This course is a mixture of both sidewalk and gravel trails and is well-suited for all ability levels. After the race, plan to stick around for all-you-can-eat pancakes from Flippin Flapjacks', […]

The Colorado brain tumor community will come together for a 5K Walk/Run to raise awareness and funds to support the needs of patients with brain tumors and their families.

The Friends of the National Center Science Stride 5k brings together our community for a common cause: Inspiring the next generation of scientists! This event provides an excellent opportunity for everyone who believes in the importance of STEM education to come together and support Friends of the National Center. Runners and walkers of all abilities […]

Join us for The Oktoberfest 5k at Prost Brewing on September 27, 2025, for a 5k-ish, fun run event that starts and ends at this awesome taproom in Northglenn. 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 […]

The Rising Phoenix Festival & 5K Run/Walk for Suicide Prevention is Combat Recovery Foundation's first community awareness event. Runners, walkers, dogs and participants of all ages, volunteers, and spectators will gather together in celebration of life. The 5K provides an important sense of community for suicide loss and trauma survivors and creates a space for […]

The Tavern at Red Feather Lakes is planning this year's Oktoberfest on Saturday, September 27th. As a part of the festivities, Caring Hearts of Red Feather Lakes Foundation is putting on our annual Lederhosen Race! The race begins at 1pm. The race starts and ends at The Tavern at Red Feather Lakes. The Oktoberfest expo […]