Pere Marquette Endurance Trail Run
Grafton, IL
Sat, Dec 12, 2026
In 64 days · Sat, Dec 12, 2026
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Saturday, December 12th, 2026
13112 Visitors Center Lane, Grafton IL
29–44°F · low rain risk
See last 10 years
On this date: rain 1 of the last 10 years
2025
30–38°F
dry
2024
21–35°F
dry
2023
32–45°F
dry
2022
34–42°F
dry
2021
33–51°F
dry
2020
37–52°F
rain
2019
32–46°F
dry
2018
35–49°F
dry
2017
27–39°F
dry
2016
26–35°F
dry
Best months to race in Illinois →
Race-day forecast says layers
29°F at the start.
Gloves, ear warmers, throwaway layers, hand warmers — delivered before race day.
About this race
This will be the 37th year of the Pere Marquette Endurance Trail Run. 7.8 miles of hills and incredible scenery through the park in December. Packet pickup and pre-race coffee available in the beautiful lodge with a roaring fire. Post race festivities and awards are also in the lodge.
The race is a go regardless of rain, sleet, snow, ice, mud or muck. It's a trail race not a day at the beach. HOWEVER.... should the Park Service close Pere Marquette State Park due to severe inclement weather or other unforeseen cause, Metro Tri Club will cancel the event and offer no refunds or deferments.
Packet Pickup: Race day starting at 7:30AM in the Pere Marquette State Park Lodge
Race Awards: Male and Female Overall, Male and Female Masters (40+), Top 3 age group in 5-year increments from 14 to the oldest person to finish
Course map
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Run clubs near Grafton to train with before race day.
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