Discover your personal limits and discover why eating pizza and drinking beer is no way to train every winter at the Discovery XC Mountain Bike Race. The race, held at the Discovery Ski Area near Philipsburg has three men's and women's categories as well as a juniors cat for the youngsters and boasts 40% singletrack in the 7.3 race mile loop. Race lengths are 5.4 to 25.8 miles. Rocks-a-go-go and lungs a- go-bye-bye. 11 AM. $35. Visit montanacycling.net.