By Justin Franz 

CHEYENNE, Wyo. — Union Pacific “Big Boy” 4014 — the world’s largest operating steam locomotive — will embark on a month-long tour starting June 26, that will take it to Utah, Nevada, California, Oregon and Idaho. 

The tour is expected to last a month and will see the locomotive, which was restored to service in 2019 for the 150th anniversary of the First Transcontinental Railroad, visit the Pacific Northwest for the very first time. Officials said the tour will mark UP’s 160th anniversary. 

While officials have announced the route — the tour will take the locomotive over California’s Donner Pass and through Oregon’s Columbia River Gorge — only a few exact dates have been released. Railroad officials said more details would be released next month. What is known is that the locomotive will depart its home base of Cheyenne, Wyo., on June 26 and be on display in Sparks, Nev., on July 6; Roseville, Calif., on July 8 and 9; Portland, Ore., on July 15 and 16; and Boise, Idaho, on July 21 and 22. The Black Butte Center for Railroad Culture also posted online that the locomotive would be on display in Dunsmuir, Calif., on July 11. That display has yet to be announced by the railroad.