 Named Barnum Road, Highway 190 travels roughly east-northeast toward Kaycee following the Middle Fork of the Powder River.At 9.66 miles, WYO 190 reaches it eastern end at Wyoming Highway 191 (Mayoworth Road) in Kaycee.Exit 254 of I-25/US 87 can be accessed via WYO 191 less than a mile east of Highway 190's terminus.