The Eureka is a privately owned 3 ft gauge steam locomotive based in Las Vegas, Nevada. It is one of three preserved Baldwin class 8-18 C 4-4-0 locomotives in the United States, of which it is the only operable example. It is listed on the United States National Register of Historic Places.

The Eureka and Palisade Railroad was a 3 ft narrow gauge railroad constructed in 1873-1875 between Palisade and Eureka, Nevada, a distance of approximately 85 miles (137 km). The railroad was constructed to connect Eureka, the center of a rich silver mining area, with the national railway network at Palisade.