Trailfest 2026

The race.

Trailfest is a 12-hour trail event held August 1, 2026, at William O'Brien State Park in Marine on Saint Croix, Minnesota. Participants choose their own start time within the 9:00 AM to 9:00 PM window and navigate the park's fully mapped trail system at their own pace, with no set course or rigid schedule. Basecamp at the park pavilion serves as the start, finish, and main aid station, offering water, sports drinks, and basic snacks, with modern restroom facilities and vault toilets available throughout the park. Participants can earn custom leather keychains by completing verified distances of 13.1 miles, 15.5 miles, 26.2 miles, 31 miles, or 62 miles (verified by GPS data at checkout). All participants are automatically entered into a drawing for a prize bag, and the individual logging the most verified mileage receives an additional prize. Camping is available at the state park and nearby campgrounds.