Race Discovery
Fox Valley Winter Challenge Trail Series 8K
Fox Valley Winter Challenge Trail Series 8K logo

Fox Valley Winter Challenge Trail Series 8K

Aurora, Illinois, United States View on map
Feb 20, 2027 (America/Chicago local time)
Trail running

About this race

Registration Has Moved

The Fox Valley Winter Challenge Trail Series has returned to a single race website for 2027 registration: https://runsignup.com/Race/IL/Batavia/FoxValleyWinterChallengeTrailSeries

The 5K, 8K, and 10K events are now all managed through one convenient registration page, allowing participants to register for any combination of races and take advantage of our new series swag rewards.

The 2027 schedule includes:

5K – January 23, 2027
8K – February 20, 2027
10K – March 14, 2027
Please visit the official 2027 Winter Challenge registration page:

https://runsignup.com/Race/IL/Batavia/FoxValleyWinterChallengeTrailSeries

We look forward to seeing you on the trails this winter!

Pick your distance

Trail running

Fox Valley Winter Challenge Trail Series 8k

Held at Oakhurst Forest Preserve in Aurora

Feb 20, 2027 8K 10:00 AM
$40.00
Open

Typical race-day weather

Based on 2 years of Open-Meteo archive data for this event's race dates in Aurora, plus the 3 days either side.

Temp (°C)
Minimum temperature (race-week average) -4.0° / Maximum temperature (race-week average) 2.5°
Feels Like (°C)
Minimum feels like — heat index / wind chill (race-week average) -10.3° / Maximum feels like — heat index / wind chill (race-week average) -1.8°
Peak wind (km/h)
Strongest wind of the day (race-week average)
20.8
Precip (mm)
Precipitation over the day (race-week average)
1.1mm
Humidity
Mean relative humidity (race-week average)
61.5%
Sunrise
Sunrise at the start line on February 20, 2027 (CST)
Sunset
Sunset at the start line on February 20, 2027 (CST)
Daylight
Hours between sunrise and sunset on race day
10h 50m

The sun rises at 6:41 AM and sets at 5:32 PM local time (CST) in Aurora on February 20, 2027 — 10h 50m 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

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Results — Fox Valley Winter Challenge Trail Series 8K

2026 edition View Results
2025 edition View Results

Other races near Aurora

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

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, 15 Aurora events

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