Yes, it's like doing the American Birkebeiner on a mtn bike. Â Not just any bike, I choose a bike built for two or tandem. Â The Chequamegon Fat Tire 40 is a 40 mile mtn bike race from Hayward to Cable , WI. Â It uses some of the famed Birkie trail along with multiple fire roads to make up the largest off road bike race in the country with about 2500 riders.