 West of the river, the freeway has a diamond interchange with WYO 220 (Poplar Street), then curves north and has a diamond interchange with US 20 and US 26, which split west toward Shoshoni and Casper–Natrona County International Airport, and the access road to the Casper Events Center.I-25 leaves the city of Casper and has an interchange with WYO 254 (Wardwell Road) next to unincorporated Hartrandt and the town of Bar Nunn.The Interstate has an interchange with Ormsby Road in the Homa Hills area on the northern edge of the Casper populated area.