The Garden of the Gods Ten Mile Run® is the premier race of Colorado Springs, coursing through the 300′ towering sandstone rock formations of Garden of the Gods Park, including the most famous rock in the area, Balanced Rock. For 45 years, the Garden of the Gods races offers a spectacular setting, a physically demanding […]

Join us for the Breckenridge Brewery Half Marathon and 5k on Sunday, June 8th, 2025. The course starts and ends at this beautiful Colorado brewery. The out-and-back course along the South Platte trail will offer scenic views of the Front Range while running along the South Platte River. There is also a 5k fun run […]

Looking for something more challenging than the adidas Terrex Après 5K but less intimidating than the adidas Terrex 20K Trail Run? Then this is the race for you! Test your legs and challenge other trail runners at almost 9,000 feet as you compete for the coveted 10K prize purse. This course will put your fitness […]

A behemoth of running races, the adidas Terrex 20K Trail Run is for the boldest competitors. Destroy a near-half marathon on a difficult course that spans nearly the entire front side of Vail Mountain! One of the more challenging and rewarding 20Ks in the nation, line up alongside some of the Vail Valley’s best trail […]

Get involved with the GoPro Mountain Games and run the adidas Terrex Sunday Funday 5K.

Get ready for the thrill of a lifetime with the ultimate adrenaline rush: the Showstopper! This event is not for the faint of heart—it’s a wild test of brainpower, brawn, and sheer willpower. Gear up to conquer Pepi’s Face, the iconic slope named after Vail’s legendary Pepi Gramshammer. Over a period of 30 minutes, you’ll […]

The Boulder Stroke & Stride enters its 23rd season in 2024, and offers Boulder area athletes a fun 1-lap 750 Meter Swim, or 2-Lap 1500 Meter swim in Boulder Reservoir, followed by a 5k run on the reservoir dam on 8 Thursday evenings (plus one Wednesday evening) throughout the summer. Many participants make their open-water […]

Looking for something to do with the whole family on Fathers Day Weekend? Look no further than the 3rd annual Happy Hour Half K on June 17th, starting at 6pm, at Civic Green Park. Have you always wanted to run a half marathon, or maybe just a 5K, but it seems like too much work? […]

The Barr Lake Trail Race returns to Brighton, CO, offering beautiful lake views and a prime opportunity for new PRs. Now in its sixth year, this event features our flattest and fastest course, with less than 100 feet of elevation gain per loop. Starting and finishing at the Nature Center, runners will enjoy a scenic […]

The half marathon is a point to point race in the middle of the Nebraska Sandhills! Runners are bused to the starting line, and enjoy a beautiful run in to the village of Arthur. The course is a single lane blacktop road, consisting of rolling hills (along with a couple of substantial hills) winding through […]

Climb4Change is a unique racing event that offers various timed races on the 200-step Challenge Hill at Philip S. Miller Park. Participants ascend 178 feet at least once in any one of the four climb challenges. There is also a non-timed fun run / walk that families can enjoy together on their own anywhere in […]

Boulder has been a household name in the world of triathlon for decades. This endurance community has built a reputation among triathletes for training hard, racing fast and enjoying every mile of scenic beauty along the way. But what makes this town really special, are all the adventures that await you after race day. Sunrise […]

Join the Colorado Ovarian Cancer Alliance on June 11th at Denver's City Park for Jodi’s Race, the 2nd largest ovarian cancer run/walk in the country, and to help raise awareness of the signs and symptoms of ovarian cancer. The family friendly event includes a 5K Run/Walk, 1-mile walk, Family Fun Zone, Furry Friends, Expo and Survivor Breakfast.

The Parker Parks and Recreation Run Series invites you to come out and celebrate Dad (or anyone) and Dash Across the Dam 3.1 miles at the Rueter-Hess Reservoir in this fun filled 5K on Father's Day weekend.

Sam was a remarkable young man whose life was tragically cut short in a plane crash in September 2022. At just 23 years old, Sam had recently graduated from Colorado State University (CSU) in December 2021 and was pursuing his dream of becoming a commercial airline pilot. He began flight training in the summer of […]

We are so excited to announce that Sierra’s Race will host our annual Run/Walk!!!! It’s going to be an amazing event, so mark your calendars…and stay tuned for more details! If you haven’t had the opportunity to listen to Sierra’s Story, please take a few moments to watch this short video (https://vimeo.com/396357014) and learn how […]

The Estes Park Marathon is America’s most scenic marathon course! In the marathon, runners enjoy our famous road course that is surrounded by glorious 360 degree views of Rocky Mountain National Park. Starting with an inspiring 1500 ft descent, within the first 6.5 miles, runners will find their rhythm and strong pace for an exceptional […]

Come up to scenic Elk Meadow Open Space for an exhilarating 5.1 mile trail run. This is a timed event that starts and ends near the Lewis Ridge Trail Head.

Dash, Paddle, Pedal in beautiful Ridgway State Park. Our trail tri includes a 4 mile trail run, 1.5 mile paddle (SUP) & 8.5 mile mountain bike ride. Team and individual divisions.

The Summer Sizzle 5K isn't just a race; it's a summer festival! Bring your friends and family to enjoy a lively atmosphere filled with music, vendors, fitness classes on the fitness court and engaging activities for all ages. Make it a day to remember with a post-race celebration that captures the spirit of summer. Whether […]

Let the trail races begin!! This is a challenging trail run on the scenic single track trails of historic Howelsen Hill, Steamboat’s outdoor playground. The trails of Emerald are beautiful this time of year with abundant aspen trees and wildflowers. Distances: 8 mile and 4 mile

How fast can you run a mile? What if you got to do it on a downhill? We are partnering with RunMental to bring you the second annual Springs Downhill Mile on June 17th at North Monument Valley Park.

The Melanoma Research Foundation would like to welcome you to the 2022 Denver Miles for Melanoma 5K! This annual signature event will bring together local melanoma patients, survivors, care partners, supporters and healthcare heroes to fundraise and help continue the fight against melanoma.

Join us for a 10K hill climb, 10K run, or both. Ride up, run up, or double up! From junior athletes up to professional racers, we have a category that suits everyone - even if it’s your first race! We pride ourselves on offering a welcoming, fun race event for anyone who wants to get […]