Gear up for the 29th annual Twilight Criterium, one of the hottest, fastest and most lucrative urban bike races in the West. Last year, more than 20,000 spectators came out to watch cyclists vie for prizes ranging from $500 to $15,000. The race is slated for Saturday, July 11, with events scheduled from 12:30 p.m. to 9:45 p.m. Races begin at 2:45 p.m., with pro cyclists set to compete at 6:45 p.m. The course runs a loop through downtown, starting and ending at Ninth Street, and more than 300 cyclists will compete in races throughout the day, including men's and women's USA Crit Championship races. Festivities kick off with a kid's race led by two-time Olympic gold medalist Kristin Armstrong. New this year is the GreenBike Celebrity Ride, in which local celebrities are invited to ride the course with one of the new Boise GreenBikes.