Patrick Clark remembers the day his racing career went off road. The 20-year-old, who cut his teeth racing go-karts and then moved into drag racing, climbed into the cockpit of SuperLite truck piloted by off-road legend Chuck Dempsey. And at some point on that Salt Lake City track in the summer of 2010, with dirt flying and horsepower humming beneath his feet, Clark became a SuperLite racer.