Founded as a local project in 1973, the Lake Superior Railroad Museum occupies the lower level of Duluth's Historic Union Depot (the St. Louis County Depot), an 1892 building on the National Register of Historic Places. Most of its exhibit space is enclosed for all-weather viewing, and the collection focuses on railroading in the Lake Superior region: the iron-ore roads, the Great Northern and Northern Pacific, and the lines that built northern Minnesota and Wisconsin.

The museum's signature exhibit is Duluth, Missabe & Iron Range No. 227, a Class M-3 2-8-8-4 "Yellowstone" articulated locomotive built by Baldwin in 1941, among the largest and most powerful steam locomotives ever built, with the DM&IR fleet rated at roughly 140,000 pounds of tractive effort. Visitors can climb into the cab and sit in the engineer's seat. Nearby stands the William Crooks, a 4-4-0 "American" built in 1861 that became the first locomotive to operate in Minnesota.

Beyond the headline locomotives, the collection spans steam, diesel and electric power, cabooses, passenger and freight cars, and service equipment, including the Northern Pacific Rotary Snow Plow No. 2 (built 1887 by Cooke), the world's oldest surviving rotary snow plow and a designated Historic Mechanical Engineering Landmark. The museum also owns and operates the North Shore Scenic Railroad, whose excursion trains run from late May through mid-October using historic equipment from the collection.

The covered train shed lets you photograph equipment regardless of weather, but the enclosed lighting is mixed, so a fast lens or a higher ISO helps. The cab of DM&IR No. 227 and the polished boiler of the William Crooks are the signature shots. Depot Square's 1910 streetscape and the vintage trolley make strong period images in season. Note the museum's photo policy: personal photography is welcome, but images are for private use only, and food and drink are not allowed in the exhibit area.

For railfans, the draw is the chance to stand beside, and inside, some of the most significant locomotives in North American railroading. DM&IR No. 227 is one of only a handful of surviving "Yellowstone" 2-8-8-4s, machines designed specifically to drag mile-long iron-ore trains from the Iron Range down to the ore docks at Duluth and Two Harbors. Being able to climb into the cab of a locomotive of this size is rare.

The collection's depth is equally compelling: the 1861 William Crooks (a New Jersey Locomotive & Machine Co. 4-4-0), Soo Line No. 2719, a 1923 Alco 4-6-2 "Pacific" acquired in 2019, Northern Pacific's tiny 1870 Porter 0-4-0ST "Minnetonka," and a Milwaukee Road GE EF-1 electric of 1915. Several pieces, including the Duluth & Northeastern No. 28 Consolidation, remain operational and pull North Shore Scenic Railroad excursions.

It is also a working interpretive site. Depot Square recreates 22 storefronts based on Duluth around 1910, a vintage electric trolley runs in season, and two working model-railroad layouts operate year-round, with a Lionel toy-train display added at the holidays. Explore Minnesota notes the museum was voted USA Today's "Best Transportation Museum in America."

The museum is largely indoors and on track level, so the locomotives and rolling stock sit on real rails in a covered train shed, a comfortable visit in any weather. Most exhibits are hands-on: you can walk through passenger cars, cabooses and a railway post office, peer into shop windows along Depot Square, and climb into the cab of the Mallet.

Plan on roughly two to three hours; serious railfans easily spend longer. The Depot also houses other attractions and cultural organizations, so families can combine a visit. The North Shore Scenic Railroad ticket windows are at the east end of the museum near the gift shop, and museum admission is half price with a train ticket.

Crowd levels are heaviest in summer and during the December "Christmas City Express" season, when the museum closes early on weekend evenings for performances. The museum is fully accessible at floor level, though the historic equipment itself was not built for wheelchair access and is viewed from the ground.