Race Discovery
Colleen De Reuck XC Classic
Colleen De Reuck XC Classic logo

Colleen De Reuck XC Classic

Boulder, Colorado, United States View on map
Oct 31, 2026 (America/Denver local time)
Running

About this race

The Colleen De Reuck Cross Country Classic is a XC meet honoring one of the world's greatest ever distance athletes and Boulder local, Colleen De Reuck.

Each year, we celebrate Colleen’s career and her devotion to the sport of running, while promoting health and fitness, and also acknowledging a different Boulder Olympian every year.

The Colleen De Reuck Cross Country Classic is Race 2 of the Boulder XC series, taking place on Saturday October 31st. It will host a series of XC races for runners of all ages and abilities.

RACE 2
Harlow Platts Community Park
1400 Knox Dr. South Boulder, 80305

TIME
9:00AM - 10:30AM

COST - (This will help cover venue hire, electronic timing, portable toilets and insurance)

Mountain Lions Participants - FREE
12 YEARS & UNDER - $15.00
13 - 19 YEARS - $20.00
20 YEARS & OLDER - $25.00

SCHEDULE
9:00AM   10 YEARS & UNDER - 1K
9:15AM    16 YEARS & UNDER - 3K
9:45AM   OPEN - 5K

Pick your distance

Running

5K XC - Open

Oct 31, 2026 5K 9:45 AM
$25.00
Open

3K XC - 16 Years & Under

Oct 31, 2026 3K 9:15 AM
$20.00
Open

1K XC - 10 Years & Under

Oct 31, 2026 1K 9:00 AM
$15.00
Open

Typical race-day weather

Based on 3 years of Open-Meteo archive data for this event's race dates in Boulder, plus the 3 days either side.

Temp (°C)
Minimum temperature (race-week average) -0.7° / Maximum temperature (race-week average) 13.3°
Feels Like (°C)
Minimum feels like — heat index / wind chill (race-week average) -4.6° / Maximum feels like — heat index / wind chill (race-week average) 12.7°
Peak wind (km/h)
Strongest wind of the day (race-week average)
13.1
Precip (mm)
Precipitation over the day (race-week average)
0.9mm
Humidity
Mean relative humidity (race-week average)
49.6%
Sunrise
Sunrise at the start line on October 31, 2026 (MDT)
Sunset
Sunset at the start line on October 31, 2026 (MDT)
Daylight
Hours between sunrise and sunset on race day
10h 30m

The sun rises at 7:29 AM and sets at 5:59 PM local time (MDT) in Boulder on October 31, 2026 — 10h 30m of daylight.

Course

No course map published yet.

The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.

Reviews

Done this event?

If you've participated in this event, share your experience with other runners

Results — Colleen De Reuck XC Classic

2025 edition View Results
2024 edition View Results

Other races near Boulder

Different organizers, within 40 miles, in the next three months

🏃 Plan Your Next Race in Boulder

Find upcoming events by distance:

Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.

  • Entries, prices, waves and inclusions — the event's official registration page
  • Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
  • Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
  • Comparisons and counts — Race Discovery calendar, 27 Boulder events

Spotted something wrong? Tell us and we'll fix it.