Looking for a genuine test of your endurance? This Western Maine event held at Sunday River Resort puts you through the ultimate gauntlet with a demanding course that snakes across ski slopes, forest sections, and mountainous terrain—all packed with creative obstacles to keep things interesting. Since launching in 2010, it's earned its reputation as New England's most intense and entertaining obstacle adventure, whether you're racing for a podium finish, aiming to simply cross the finish line, or just embracing the muddy chaos. Mark your calendar for July 25, 2026, and prepare for the kind of adventure you'll be retelling for years to come.