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The Elko Subdivision is a railway line in Nevada owned and operated by the Union Pacific Railroad running from Weso (switching point just east of Winnemucca) to the freight yard in Elko. It is part of both the Overland Route and the Central Corridor. The line generally follows the Humboldt River and has several small tunnels while traversing the Palisade and Carlin Canyons, the longest tunnel is called the Carlin Tunnel.