What happens if the weather is severe?

The event will be cancelled without refunds or deferments if the Park Service closes Pere Marquette State Park due to severe weather or unforeseen causes.

What are the award categories?

Awards are given to the top male and female overall finishers, top masters (40+), and the top three finishers in 5-year age increments starting at age 14.

All races

9 weeks out

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All races

9 weeks out

Pere Marquette Endurance Trail Run

Saturday, December 12, 2026Grafton, IL7.8 Miles

The Pere Marquette Endurance Trail Run returns for its 37th year, offering a challenging 7.8-mile course through the scenic terrain of Pere Marquette State Park. Runners should prepare for a true trail experience, as the event proceeds through rain, sleet, snow, or mud. The race day experience is anchored by the historic park lodge, where participants can enjoy pre-race coffee by a roaring fire. Post-race festivities and awards ceremonies are also hosted within the lodge, providing a warm retreat after the winter run. This event is a test of grit, designed for those who embrace rugged conditions over easy paths.