Location: US-287 at the Colorado Line, Cimarron Cty Reassurance shield as we enter Oklahoma. Oklahoma 3 materializes out of thin air here. While 287 and 385 quickly traverse the panhandle, beelining to Texas on slightly different routes, Oklahoma 3 will head all the way across to the southeast corner of the state in Arkansas. Location: … Continue reading U.S. Route 287, OK-3/CO State Line to US-385/OK-3