The Lake Superior Railroad Museum is a railroad museum in Duluth, Minnesota. The museum has seven steam, fourteen diesel and two electric locomotives, and over 40 other pieces of rolling stock. The collection includes the William Crooks, which became the first locomotive to operate in the state of Minnesota in 1861, and the Duluth, Missabe and Iron Range Railway Number 227, a 2-8-8-4 "Yellowstone" locomotive which was among the largest steam engines to ever operate.