Lake Superior & Ishpeming RR No. 24 is a class SC-4 2-8-0 Consolidation type steam locomotive. It was built by Alco in 1910 for the Lake Superior & Ishpeming as #40 for one of its constituents, the Marquette & Southeastern Railway, which operated a sixty mile line between Big Bay and Lawson, MI.

In 1911, the Marquette & Southeastern merged with the Munising Railway, a short line between Munising and Princeton, MI.

The Munising, Marquette & South Eastern Railroad merged with the Lake Superior & Ishpeming Railroad in 1923.

The LS&I renumbered the locomotive #24, and modernised it with a wider firebox in 1931.

The locomotive was retired in 1939 and it was donated to the National Railroad Museum as their first steam locomotive to operate as a tourist engine.

Today it's still at the National Railroad Museum but the engine is now a static display.