Milwaukee Road No. 261

Design and Construction

No. 261 was built by the American Locomotive Company in July 1944, one of a group of ten Class S3 4-8-4 “Northern” type locomotives, numbered 260 through 269, that the Chicago, Milwaukee, St. Paul and Pacific Railroad, universally known as the Milwaukee Road, ordered to help handle the enormous surge in wartime freight and troop traffic. The S3 class incorporated the latest steam locomotive technology of the era, including roller bearings throughout the running gear, and while it was somewhat less powerful on paper than the railroad’s earlier S2 class Northerns, it was more efficient to operate and maintain, a valuable trait for a locomotive built at a time when both materials and skilled labor were in short supply.

Revenue Service, 1944 to 1954

No. 261 spent a decade doing exactly the kind of work it was built for, moving both passenger and freight trains over the Milwaukee Road’s system. Like most of the wartime-built steam fleets across the country, its career was cut short by the rapid postwar shift to diesel power, and the locomotive was formally retired in August 1954, after barely ten years of active service.

Preservation and Museum Years, 1958 to 1991

Rather than being scrapped, No. 261 was set aside for preservation, and in 1958 the Milwaukee Road donated it to the newly forming National Railroad Museum in Green Bay, Wisconsin, where it became the very first piece of equipment the museum ever owned. For more than three decades the locomotive sat on static outdoor display in Green Bay, a well-known regional landmark but a cold, silent machine rather than a working one.

Restoration to Service, 1991 to 1993

That changed in 1991, when a newly formed volunteer group called Friends of the 261 set out to return the locomotive to operating condition, working in partnership with North Star Rail, Incorporated, which carried out the mechanical rebuild at a General Electric shop facility in Minneapolis. The restoration moved remarkably quickly by the standards of steam locomotive projects, and No. 261 passed its Federal Railroad Administration inspection on September 14, 1993, becoming the first Milwaukee Road steam locomotive to turn a wheel under its own power since 1957. Its first public excursions followed just days later, on September 18 and 19, 1993.

First Excursion Era, 1993 to 2008

For the next fifteen years No. 261 became one of the more visible and well-traveled preserved steam locomotives in the upper Midwest, running excursions in partnership with various host railroads under the Friends of the 261 banner while ownership of the locomotive itself remained with the National Railroad Museum under a lease arrangement. The locomotive’s 2008 excursion season ended that September, at which point it went down for a Federal Railroad Administration mandated fifteen-year boiler inspection and overhaul, a routine but expensive milestone every operating steam locomotive must pass.

Ownership Dispute and Purchase, 2008 to 2010

The 2008 overhaul coincided with a breakdown in the lease relationship between the Friends of the 261 and the National Railroad Museum. As the lease expired at the end of 2008 with renewal terms unresolved, there was genuine uncertainty about whether the locomotive would ever run again, and negotiations grew increasingly contentious through 2009. The impasse was resolved on National Train Day, May 8, 2010, when the Friends of the 261 announced they would purchase the locomotive outright from the museum for a little less than a quarter million dollars, finally securing long-term control over the engine’s future.

Second Restoration and Return to Service, 2010 to 2013

With ownership settled, the Friends carried out a comprehensive four-year overhaul intended to keep No. 261 running for the following fifteen years of FRA certification. The locomotive returned to active excursion service on May 11, 2013, with its first post-rebuild trip running north to Duluth, Minnesota. Since that overhaul, No. 261 has been recognized as the largest coal-burning steam locomotive in regular operation in the United States.

Recent Operations and Current Status

No. 261 today operates under the umbrella of Railroading Heritage of Midwest America, the successor organization that has grown out of the original Friends of the 261 group and now oversees a broader collection of preserved equipment, including several Union Pacific diesel locomotives donated in recent years and a historic former Rock Island facility acquired in 2022 that serves as a maintenance base. The locomotive continues to run periodic mainline excursions across the upper Midwest in cooperation with host railroads and Amtrak, including an extensive set of runs over Twin Cities and Western trackage on October 4 and 5, 2025, which marked one of its more significant recent outings.

Recognition

As the sole surviving operable example of the Milwaukee Road’s Class S3 Northerns and one of a small number of large steam locomotives still capable of true mainline excursion speeds, No. 261 is regarded as one of the flagship survivors of Midwestern steam railroading, valued both for its size and power and for the volunteer-driven persistence that has kept it running through two separate restorations and one serious ownership crisis over more than three decades of preservation.