The Dirty Burg takes place at the Cannonsburg Ski Area in Southwest Michigan and features a unique course that includes the thrill of a ski hill. Runners tackle a 10k loop that combines roughly 5.5 miles of scenic rolling single track with a challenging 0.7-mile ascent and descent of the ski slope. Participants can choose from various distances, with the 25k comprising one 5k loop and two 10k loops, while the 50k challengers complete the 10k loop five times for a tough endurance test.