Start and finish at Civic Center Park amongst Denver's biggest chocolate aficionados. All participants receive a technical running quarter zip with registration. Runners can also enjoy hot chocolate, chocolate fondue, and dipping snacks at the post-race party! It’s not just a race, it’s an experience. Register today!

Welcome to the annual Windsor CO Race! This year's event will start and end at The Island at Pelican Lakes in Water Valley, with a great after party including beer, music and live entertainment! New to the series is a Full Marathon distance, as well as the Half Marathon and Heavy 10K.

Join us for the New Belgium Half Marathon and 5k on Sunday, October 6, 2024. The course starts and ends at this beautiful Fort Collins, Colorado brewery. The out-and-back course along the Poudre Trail will offer scenic views while running along the Poudre River. There is also a 5k fun run option. Start Times: The Half […]

Join us for the annual Spooky Sprint 5k/10k & Half Marathon! A fun, Halloween-themed event that is perfect for the whole family.

Run from the shadows of the world's largest Mountain Carving, Crazy Horse Memorial, to the Heart of the Black Hills, South Dakota to finish in Hill City!

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 […]

We're excited to invite you to be a part of The Michael J. Fox Foundation’s Denver Run/Walk, a community event dedicated to raising awareness and funds for Parkinson's research. Lace up your sneakers and join us as we come together to make a difference in the lives of those living with Parkinson's disease. Event Highlights: […]

Join us Sunday October 6th at 9:00am for the Second Annual Strides for Sierra 5K run/walk fundraiser. Get your sweat on running or enjoy a leisurely stroll through the beautiful neighborhood surrounding Sierra Elementary! Starting at 10:00am the little ones can participate in a 1K fun run around the Sierra track. Afterwards stay and enjoy […]

The Fall Series consists of four trail races in four different city/county parks. The trails range from well-maintained to rocky with tree roots. Each event is a unique challenge at a different distance, getting longer as the series progresses. Fall Series I - 5KFall Series II - 4 MileFall Series III - 5.5 MileFall Series […]

Join us for the University of Colorado School of Dental Medicine's annual ASDAsh 5K to Beat Tooth Decay! This year, all of the proceeds will be donated to our campus community to fund the Generations Program. The Generations Fund was started by a former CU dental student, Dr. John Raabe, whose father was also a dentist. […]

Join us for the A Bit Twisted 5k on October 12, 2024, for a 5k-ish, fun run event that starts and ends at this awesome taproom in Aurora. 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 […]