Erie Half

Reliance Park 900 Weld County Road 1.5, Erie, CO, United States

Join us for the Erie Half and 5k! The Hometown Race Series features half marathons and 5k distance events in outlying communities outside the Denver and Boulder metro areas. LOOK UP! At the Erie event, we often see the early morning skies with dotted with delightfully colorful hot-air balloons. Whatever distance you're ready to tackle, […]

Dash for Democracy 5K

Cheesman Park 1601 Race St., Denver, CO, United States

Join us for the 2nd annual Dash for Democracy! Meet the Denver Democrats, candidates and elected officials and join us for a run (or walk) and food. Registration begins at 8 am and the run begins at 9. There will be two race options, a 5k and a 1k. Pick whichever suits you and then […]

Outdoor Divas Triathlon

Union Reservoir 461 County Road 26, Longmont, CO, United States

The Outdoor Divas Sprint Triathlon on August 21st, annually awarded best women's event in Colorado by Competitor Magazine, is the all women's triathlon you've been waiting for!  We intentionally keep the race cap low at 600 women to create a fun, festive, yet intimate racing environment.  Great goodie bags, one of our biggest expos of […]

Race for Research 5K

Washington Park - Denver 701 S Franklin St, Denver, CO, United States

The Annual Cancer League of Colorado Race for Research 5K is excited to be back to the full event you love at Washington Park in Denver! The Race for Research raises money for the Cancer League of Colorado, a non-profit charitable organization that is run entirely by volunteers with no paid staff or offices. The […]

Eye Love Logan and Zoe 5K

Westminster Promenade 10600 Westminster Blvd, Westminster, CO, United States

Welcome back to the Eye Love Logan and Zoe 5k.  We are so thankful for all the years of support for this cause.  We have watched our kids slowly lose their sight over the years and are, for the first time, hopeful that a clinical trial focusing on this rare gene mutation will be starting […]

Into the Hills Eltuck 5K

Lory State Park 708 Lodgepole Dr, Bellvue, CO, United States

Join us each Tuesday evening in August for a fun series of shorter midweek trail races. Our goal is to offer a fun, low-key series of races designed to give newer trail runners an opportunity to dip their toes into the trail racing waters, and to offer more experienced trail racers a chance to sharpen […]

$25 – $80

Ute 100

Masons Draw Campground Forest Rd 4821, Moab, UT, United States

The Ute 100 is the highest and most scenic race in Utah, taking runners on a breathtaking tour of the La Sal Mountains, Utah's second highest mountain range. The 100 mile course has an average elevation over 8,700 ft and boasts roughly 23,000 ft gain.

Continental Divide Trail Run

Steamboat Springs Ski Resort 2305 Mt Werner Cir, Steamboat Springs, CO, United States

Distances: 50k (9 hour cutoff) and 16 mile (7 hour cutoff) and 5 mile (New!)

Westminster Trail Race

Wayne Carle Middle School 10020 100th Ave, Westminster, CO, United States

Join us at beautiful Standley Lake in Westminster as we race around the lake. The 12th Annual event is a great course for those competitive, intermediate, or novice runners. The trails are mix of packed dirt trails, single track, and some minimal bike path. Oh...and don't forget about the views! Runners will be surrounded with […]

Boulder Sunset Triathlon

Boulder Reservoir 5565 N 51st St, Boulder, CO, United States

Summer may be coming to an end, but our tri season is still heating up! Join us at the Boulder Reservoir for the 13th Annual Boulder Sunset Triathlon, a local favorite. For the 5th year in a row we are the proud host of the Mountain Collegiate Conference race and the USAT Duathlon Race Series. […]

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.