CHEYENNE, Wyo. — Union Pacific has announced its long-awaited schedule for steam operations this summer, featuring the return of Big Boy 4-8-8-4 No. 4014.

Events begin Saturday, April 27, with 4-8-4 No. 844’s departure from Cheyenne. It will travel to Rock Springs, Wyo., that day, and to Ogden, Utah, on April 28. It will be on display in Ogden April 29-May 4 and May 6-8, then take part in the Gold Spike 150th anniversary celebration in Ogden on May 9.

The Big Boy will be christened on Saturday, May 4, in Cheyenne at 9:30 a.m., and depart a half-hour later for Rawlins, Wyo. On May 5, it will go from Rawlins to Rock Springs; on May 6, from Rock Springs to Evanston, Wyo. After a day in Evanston with no public display, it will travel from Evanston to Ogden on May 8 and take part in the celebration on May 9.

Both locomotives will be displayed in Ogden May 10-11 before double-heading back to Cheyenne, traveling from Ogden to Evanston, on May 12 and Evanston to Rock Springs on May 13. After two days of display in Rock Springs (May 14-15), the doubleheader will move to Rawlins on May 16 and to Laramie, Wyo., on May 17. After one day in Laramie with no public access, they will complete the return to Cheyenne on Sunday, May 19.

A full schedule with times and information on intermediate stops each day is available on the Union Pacific website.