NPRA Bull Riding ChallengeNPRA Bull Riding Challenge(Photo by Ryan Pierse/Getty Images)Share on TwitterShare on FacebookEvery day until January 24, 2015, 12:00AM - 11:59PMW.H. Lyon Fairgrounds100 N Lyon Blvd, Sioux Falls, SD 57107 United StatesEvent Website: www.sioxempirefair.com Additional Information7:30pm at the Expo Building at the W.H. Lyon Fairgrounds.