There are trains — and then there’s Big Boy.
In 2026, railroad fans across the country will have the rare chance to witness history in motion as Union Pacific’s legendary Big Boy No. 4014 travels coast to coast in celebration of America’s 250th anniversary. The world’s largest operating steam locomotive is expected to make several appearances across Pennsylvania, giving railfans, photographers, and curious travelers a once-in-a-generation opportunity to experience the thunder, steam, and spectacle of a true American icon.
Built in 1941 to haul heavy freight through the mountains of the American West, Big Boy No. 4014 is one of only eight surviving “Big Boy” locomotives, and the only one still in operation today. Stretching more than 130 feet long and weighing over one million pounds, the locomotive represents the golden age of American rail travel and engineering.
For Pennsylvania, the tour feels especially fitting. Railroads helped shape the Commonwealth’s identity, fueling industries, connecting cities, and transforming towns into thriving hubs of commerce and innovation. From the engineering marvel of the Horseshoe Curve to the rich rail heritage preserved at Steamtown National Historic Site, Pennsylvania has long been one of America’s great railroad states.
Pennsylvania Stops & Viewing Opportunities
While exact times and routes may shift, Union Pacific has announced several major Pennsylvania appearances as part of the 2026 eastern tour:
Scranton and Northeastern Pennsylvania
Big Boy No. 4014 is scheduled for public display in Scranton in mid-June, where rail enthusiasts will have a chance to see the locomotive up close at Steamtown National Historic Site. The visit is especially meaningful because Scranton is already home to another preserved Big Boy locomotive, creating a rare reunion of railroad giants.
Additional excursions and whistle-stop events are planned throughout Northeastern Pennsylvania, including special appearances along the Reading & Northern Railroad corridor.
Philadelphia and America's 250th Anniversary
Over Fourth of July weekend, Big Boy No. 4014 is expected to arrive in Philadelphia as part of the nationwide celebration for America's 250th. The locomotive’s appearance in the birthplace of American independence adds another layer of symbolism to the coast-to-coast tour.
Few settings feel more fitting for a historic steam locomotive than Philadelphia — a city where American innovation, industry, and transportation history all intersect.
Altoona and the Horseshoe Curve
Railfans will also want to keep an eye on Altoona, one of Pennsylvania’s most legendary railroad towns. Public viewing days are anticipated there in July, with potential viewing opportunities near the iconic Horseshoe Curve.
For train enthusiasts, few experiences compare to seeing a massive steam locomotive navigate the Allegheny Mountains — especially at one of the most famous railroading landmarks in the world.
Pennsylvania Viewing Schedule
It's recommended to check the Union Pacific website for up-to-date information.
Tuesday, June 9
North East, PA near the Lake Shore Railway Museum (near 143 S. Lake St.). Arrives at 11:25 a.m.; departs at 11:35 a.m.
Saturday, June 13
Nicholson, PA at Tunkhannock Creek Viaduct. The train will pass at 10 a.m.
Sunday, June 14
Union Pacific Museum Passenger Special traveling from Nesquehoning, PA to Pittston, PA. This passenger ride is sold out.
Monday, June 15 - Tuesday, June 16
Scranton, PA at Steamtown National Historic Site (350 Cliff St.). Ticketed viewing will be held from 9 a.m. - 3 p.m. Tickets and parking information are available from the National Park Service.
Wednesday, June 17 - Tuesday, June 30
Scranton, PA at Steamtown National Historic Site (350 Cliff St.). Locomotive maintenance; distant viewing available during park hours: 9:30 a.m. - 4 p.m. Tickets and parking information available from the National Park Service
Thursday, July 2
Reading, PA at Reading & Northern Outer Station (3501 Pottsville Pike). Arrives at 2:15 p.m.; departs at 3 p.m.
Pottstown, PA at Pottstown Train Station (35 S. York St.). Arrives at 4:15 p.m.; departs at 4:30 p.m.
Saturday, July 4 - Sunday, July 5
Philadelphia, PA at Intrepid Ave. & League Island Blvd. The engine will be on display from 9 a.m. - 3 p.m. Free admission; no tickets required. No public access outside of these hours.
Tuesday, July 7
Lebanon, PA at Lebanon Station (250 N. 8th St.). Arrives at 12:30 p.m.; departs at 1:15 p.m.
Wednesday, July 8
Lewistown, PA at Roundhouse Road crossing. Arrives at 12:45 p.m.; departs at 1:15 p.m.
Altoona, PA at Railroaders Memorial Museum (1200 9th Ave.) Arrives at 5:15 p.m.; departs at 5:45 p.m. EDT
Thursday, July 9 - Friday, July 10
Altoona, PA. Visitors can access free shuttles from Peoples Natural Gas Field (1000 Park Ave.). No parking will be available at the display site; please utilize shuttles. The steam engine will be on display from 8 a.m. - 2 p.m. Free admission, no tickets required.
Saturday, July 11
Altoona, PA at Horseshoe Curve National Historic Site. Ticketed viewing is sold out.
Cresson, PA at Cresson Railroad Park (501 Front St.). Arrives at 10:45 a.m.; departs at 11:15 a.m.
Leetsdale, PA at 1st St/Avenue A and Ferry St. Arrives at 5:45 p.m.; departs at 6:15 p.m.
Pennsylvania’s Railroad Legacy
Long before interstate highways and air travel connected the country, Pennsylvania’s railroads powered American expansion.
The Pennsylvania Railroad was once the largest railroad by traffic and revenue in the world, earning Pennsylvania the nickname “The Standard Railroad of the World.” Cities like Altoona, Harrisburg, Scranton, and Pittsburgh became industrial powerhouses thanks to the railroad industry’s reach and influence.
Today, remnants of that legacy still crisscross the Commonwealth — from preserved depots and museums to scenic excursion railways winding through forests, mountains, and river valleys.
More PA Attractions for Railroad Enthusiasts
Can’t make it to the Big Boy tour? Pennsylvania is filled with year-round train destinations that celebrate the state’s deep railroad roots.
Steamtown National Historic Site
One of the premier railroad museums in the country, Steamtown features historic locomotives, rail equipment, interpretive exhibits, and seasonal train rides through the Lackawanna Valley.
Horseshoe Curve National Historic Landmark
This National Historic Landmark remains one of the engineering wonders of American railroading. Watch modern freight trains climb the Allegheny Mountains from a spectacular mountainside overlook.
Railroad Museum of Pennsylvania
Located in Lancaster County, this museum houses one of the most significant collections of historic Pennsylvania Railroad artifacts and locomotives in the world.
Strasburg Rail Road
America’s oldest continuously operating railroad still offers steam-powered rides through the Pennsylvania countryside — an unforgettable experience for families and railfans alike.
East Broad Top Railroad
This restored narrow-gauge railroad offers a glimpse into a different era of Pennsylvania industry and transportation, complete with historic locomotives and machine shops.
Plan Your Rail Adventure
Big Boy No. 4014’s Pennsylvania appearances are expected to draw large crowds, especially during major public display days. Travelers should check Union Pacific’s official schedule regularly for updates, route details, and safety information before heading out.
Whether you’re a lifelong railfan or simply looking for a uniquely Pennsylvania experience, 2026 offers the chance to witness living history rolling across the Commonwealth — one whistle blast at a time.
Header image credit: Union Pacific