High Quality Content by WIKIPEDIA articles! State Highway 58 (abbreviated SH-58 or OK-58) is the name of two state highways in Oklahoma. One of them runs for 73 miles (117.5 km) from Medicine Park to the Blaine–Custer County line near Hydro, and the other connects US-270/281/SH-3/33 to the Kansas state line, running 106 mi (171 km). The northern section has one lettered spur route, SH-58A.