Montezuma's Revenge is the ultimate mountain bike race, which to this date has never been completed. Although anyone is welcome to challenge the course, usually only top-tier cyclists attempt 24 hours of riding, especially under the hardest of conditions. Riders can bike up to 240 miles, crossing the Continental Divide 10 times; also they may climb over 36,000 vertical feet, with the lowest elevation at 9,000' and the highest at 14,270'.

Rishi Grewal won the race in 1999, 2001, 2002 - more times than any other racer.