In the order to maintain safety of everyone at the Sioux Empire Fair and continue to keep this a family friendly event the Sioux Empire Fair is enacting a 9pm curfew for anyone 17 and under not accompanied by a parent or legal guardian. Anyone 17 and under must be accompanied at all times after 9pm while on the W.H. Lyon Fairgrounds. The curfew will be enforced at the Sioux Empire Fair on the W.H. Lyon Fairgrounds starting August 1 until the end of the fair on August 9.