The Twilight Criterium lasts just one day, but that doesn't stop bike-loving Boiseans from waiting for its arrival all year. Luckily, the race is finally back in town and both professional and amature cyclists from across the country are in full prep mode to shred some asphalt. The event kicks off with the annual kid's ride and autograph session led by Olympic gold medalist Kristin Armstrong at noon, and continues with men's and women's races, plus a Boise GreenBike celebrity bike ride. At 6:50 p.m., an opening ceremony will celebrate the start of pro racing, which eager fans can watch from the Twilight Fan Expo at Cecil D. Andrus Park. A closing ceremony will wrap up the event at 10 p.m. and signal the start of another year of waiting—so make the most of the TC while it lasts.