The Shafter Subdivision is a rail line owned and operated by the Union Pacific Railroad as part of the Central Corridor in the U.S. states of Nevada and Utah. The line begins in Elko, and travels east to the rail siding of Smelter in Utah, at the junction with the Lynndyl Subdivision of the former Los Angeles and Salt Lake Railroad. The line was formerly part of the Western Pacific Railroad.Shafter is the name of the rail siding at the junction between this line and the Nevada Northern Railway.