Logo

Colleen De Reuck XC Classic

Boulder, United States • 1 Nov 2025

The Colleen De Reuck XC Classic is a cross country running event held annually at Harlow Platts Community Park in Boulder, Colorado. Honoring renowned distance runner Colleen De Reuck, the race promotes health, fitness, and celebrates local Olympians, with 2025 honoring 2012 Olympic marathoner Yoshimi Ozaki. The event features multiple race distances catering to all ages and abilities: a 1K for children 10 and under, a 3K for youth 16 and under, and a 5K open race for participants aged 14 and older. The meet is part of the Boulder XC series and offers a welcoming atmosphere for runners of all levels. Visit the organization's website for the most recent information.

United States Colorado Boulder

Race information

Registration
5 km
5k Xc - Open
3k Xc - 16 Years & Under
1k Xc - 10 Years & Under
Visit the organization's website for the most recent information.
Trail runs nearby

Expo Park XC Run

Denver - 23 mi from Boulder

Join the Expo Park XC Runs in Aurora on Sunday October 19 for youth and adult cross country races from 1k to 5k. Enjoy mostly grassy, gently rolling courses with a creek crossing and bale jumps for a fun, family friendly race day.

Beware The Bear Trail Races

Morrison - 25 mi from Boulder

Tackle scenic dirt trails at Bear Creek Lake Park with 5 km, 15 km, a 5 plus 15 double, or a kids 1 km. Registration includes socks or a neck gaiter and a pancake breakfast while kids earn a stuffed bear at the finish.

Louisville Trail Race

Louisville - 8 mi from Boulder

Run the Louisville Trail Race on November 15, 2025, amid the Flat Irons with 13.1, 10K or 5K dirt courses on scenic trails. Enjoy post race festivities and bring a reusable cup or purchase one onsite.

Thumbs Up Vertical Challenge

Estes Park - 28 mi from Boulder

Take on the Thumbs Up Vertical Challenge in Estes Park CO on December 6, 2025, a small field test of grit with steep single track laps and sweeping views of Longs Peak and Mount Meeker. With only 30 spots, this intimate winter climb rewards..

Sourdough Snowshoe Race

Nederland - 13 mi from Boulder

The Sourdough Snowshoe Race will take place in Nederland on Saturday 31 January 2026. You can run between 18 and 30 kilometers.

Run The Ranch

Loveland - 27 mi from Boulder

...

Run the Ranch is an annual trail running event held at the scenic Sylvan Dale Guest Ranch in Loveland, Colorado. The race offers a variety of distances including 5K, 10K, and timed trail runs of 4, 6, and 12 hours, with options for solo run..