Fox Valley Winter Challenge Trail Series 10K
Decision scores
Six 0–100 scores telling you, at a glance, who this race is for.
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About the Race
The final race of the 2026 Winter Challenge Trail Series is here—and it’s the big one. On March 22, we take on a great 10K at Hickory Knolls Discovery Center in St. Charles, wrapping up the series with one last shot at winter trail glory. The course has a little bit of everything: dirt paths, crushed limestone, a few short climbs, and long stretches that test your pacing. After the 5K and 8K, this race is where it all comes together. It’s longer, it’s tougher, and yeah—your legs are probably ...
Course Profile
Course profile data unavailable for this race.
Course features
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Vibe & community
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History & past results
Past finisher times and year-over-year participation will appear here once the organizer publishes them.
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Common questions
How hard is the Fox Valley Winter Challenge Trail Series 10K 10K?
We don't have a verified elevation profile yet — check the organizer's course map for the climb breakdown.
What should I wear?
Dress for ~10°F warmer than the standing temperature once you start running. Throwaway long-sleeve at the start, gloves and a hat for sub-50°F mornings, singlet plus visor when it climbs above 60°F. The race-day forecast above is the source of truth closer to the date.
When does it sell out?
No published deadline. Most races raise the entry fee in tiers and can sell out without warning — sign up early if you're committed.
Similar races worth a look
- More like this in this city: All 10K races in St. Charles, IL
- Same distance, same month: Best 10K races in March
- Same distance, statewide: All 10K races in Illinois
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