Oklahoma State Route 51 runs eat-west across Northern Logan County. This is one of Logan County's two main east-west surface highways. From Stillwater to Interstate 35, OK St Rt 51 is multiple lanes. OK St Rt 51 passes through the following towns in Payne County. Yale Stillwater OK St Rt 51 is multi-plexed in Payne County. Oklahoma State Route 108, near Stillwater. OK St Rt 51 intersects the following highways in Payne County. Oklahoma State Route 18, near Yale. Oklahoma State Route 108, near Stillwater. Oklahoma State Route 108, near Stillwater. U.S. Rt. 177, at Stillwater. Oklahoma State Route 86, near Orlando. Interstate 35, near Orlando.
