Union Pacific's Big Boy No. 4014 — the largest operating steam locomotive in the world — is the single biggest trainspotting draw in America. Everything on this page comes from Union Pacific's own published material: UP announces and runs the tours, and its pages are the only schedule worth trusting. Third-party "complete tour" pages conflict with each other; this guide links UP instead.
Where UP publishes it
The hub is UPsteam.com — the detailed schedule (the time and location for each stop, plus instructions for ticketed events), Steam Club membership, and a real-time steam tracking map of No. 4014's location and route while it travels. Announcements arrive as Union Pacific press releases, in legs, well ahead of travel, and they distinguish two kinds of stop:
- Display days — hours-long stops where the locomotive is on show up close, with the "Experience the Union Pacific" exhibit car.
- Whistle-stops — generally 15 to 30 minutes long: arrive early, expect a crowd, and don't expect to linger.
Track it live — tour-time only. While a tour is under way, Union Pacific publishes a real-time tracking map of the steam fleet's location and route on UPsteam.com. Between tours there is nothing moving to track and the map is quiet — UP switches it on per tour, and it is the only tracking source this guide will ever cite for the Big Boy.
The 2026 tours — complete
The 2026 coast-to-coast tour, run for America's 250th, is finished. The western leg left Cheyenne on 29 March 2026 and crossed Wyoming, Utah, Nevada and California, with 27 whistle-stops and display days at Roseville, California (10–11 April) and Ogden, Utah (18–19 April). The eastern leg ran 25 May to 29 July 2026, east on Norfolk Southern — the Big Boy's first East Coast journey — with display events at Omaha, West Chicago, Buffalo, Scranton, Philadelphia, Altoona, Fostoria and St. Louis, a maintenance viewing period at Steamtown in Scranton, and a ticketed Horseshoe Curve event, before coming home to Cheyenne. Fourteen states in all.
Next public display: Denver, 21 November 2026
UP's next published event is its first holiday / Make-A-Wish tour: a public display in the Denver, Colorado area on 21 November 2026, with a ticketed museum-benefit ride in vintage cars from Cheyenne to Denver alongside it. For the exact display location and times, go to the source: Union Pacific's holiday-tour announcement and UPsteam.com. No 2027 tour had been published by UP when this page was checked in November 2026.
UP's viewing rules
Union Pacific prints the same rule in every tour announcement, and it is the rule that governs any Big Boy photograph: always remain at least 25 feet from the tracks when viewing or photographing the locomotive; never take photos or videos while standing on the track or ballast; never climb on the locomotive or any equipment. The 25 feet is not arbitrary — the locomotive overhangs the track and can discharge steam and hot water unpredictably from its cylinder cocks. On display days the setting is an active, working rail environment with uneven surfaces; admission is free except where the schedule or site mandates otherwise; there are no cab tours; expect queues. Drones are not permitted during display days, and when the Big Boy is in motion drones must remain at least 25 feet laterally from the tracks.
Railfan practice, for what it's worth, is the "leapfrog": photograph a departure from a pre-scouted legal vantage, drive ahead to the next one, repeat — never pacing the train by car, which UP's guidance also prohibits, and never assuming an overnight stop is public unless UP lists it as one.
Photograph from public ground — and only public ground. Railroad tracks, trestles, yards and rights-of-way are private property, and people are killed trespassing on them every year. The rules this section is built on, from Operation Lifesaver and the Federal Railroad Administration:
- Shoot only from public land — roads, bridge sidewalks, parks and trails — or from ground you have explicit permission to use. A worn path, a gap in a fence, or other photographers already standing somewhere is not permission.
- Never stand, sit or plant a tripod on tracks, ballast, trestles or bridges, and cross tracks only at designated public crossings.
- Stay well back: at least 15 feet from the track anywhere, and at least 25 feet for steam and special movements — Union Pacific's rule for the Big Boy. A train overhangs its track by at least three feet on each side.
- Expect a train on any track, at any time, from either direction. Never assume a line is abandoned or that a heritage timetable is the only movement — light engines, hi-rail vehicles and freights share many of these lines.
- Trains are wider, quieter and faster than they look, and they cannot stop in time. An optical illusion makes a train's distance and speed hard to judge.
- Don't pace a train by car. Park legally, and never block drives, gates or farm crossings. No coins or objects on rails; no climbing on locomotives or equipment. Drones only where the railroad and the site allow them — Union Pacific prohibits them at Big Boy display days.
- People mimic what they see in published photos — a shot taken from the tracks teaches the next photographer to stand there too.