Wyoming Highway 256  Wyoming Highway 256 (WYO 256) is a state road in Evansville, Wyoming, just east of Casper known as "Cole Creek Road". Wyoming Highway 256 begins its south end at an intersection with US 20/US 26/US 87 (Glenrock Highway) and the northern terminus of WY 253 in Evansville. The roadway that continues south of US 20/US 26/US 87 is Wyoming Highway 253 (Hat Six Road). Highway 256 travels north for northeast towards the mining areas north of the Ednass Kimball Wilkins State Park which is located on US 20/US 26/US 87. The designation of WYO 256 ends and the roadway continues as Natrona CR 701 (Cole Creek Road).