In 29 days · Sat, Oct 31, 2026
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Saturday, October 31st, 2026
1400 Knox Dr, Boulder CO
5K
32–56°F · low rain risk
See last 10 years
On this date: rain 0 of the last 10 years
2025
29–44°F
dry
2024
30–57°F
dry
2023
12–37°F
dry
2022
37–64°F
dry
2021
32–41°F
dry
2020
27–56°F
dry
2019
14–36°F
dry
2018
29–46°F
dry
2017
21–47°F
dry
2016
49–74°F
dry
Best months to race in Colorado →
Typical start here is 32°F — see the cold-start kit →
About this race
Event Overview
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.
Race Details
- Event Name: Colleen De Reuck Cross Country Classic
- Date: October 31, 2026
- Location: Harlow Platts Community Park, 1400 Knox Dr, Boulder, CO, 80305
- Race Series: Race 2 of the Boulder XC series
Schedule
- 9:00 AM: 10 Years & Under - 1K
- 9:15 AM: 16 Years & Under - 3K
- 9:45 AM: Open - 5K
Race Time
9:00 AM - 10:30 AM
Registration Costs
- Mountain Lions Participants: FREE
- Age 12 & Under: $15.00
- Age 13 - 19: $20.00
- Age 20 & Older: $25.00
Additional Information
This will help cover venue hire, electronic timing, portable toilets, and insurance.
More Information
For more details, visit the official race page: Colleen De Reuck XC Classic.
Course map
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