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Union Pacific's Big Boy visits Colorado on US tour

Big Boy No. 4014 made whistle-stops in several communities before arriving in Denver Sunday.

DENVER — The world’s largest steam engine steamed back into Colorado over the Labor Day weekend.

Union Pacific’s famed Big Boy No. 4014 is visited a total of seven Colorado cities on its cross-country tour. The locomotive made whistle-stops in four eastern Colorado towns before arriving in Denver.

Now on a 10-state tour, the Big Boy arrived in eastern Colorado on Sunday, before a public display on Monday near Denver's Union Station.

This is the first time Big Boy No. 4014 has gone on tour since its post-restoration debut in 2019 to celebrate the 150th anniversary of the transcontinental railroad’s completion. The steam locomotive was built in the 1940s to conquer mountains while carrying equipment during World War II.

Big Boy No. 4014 left its home base at the Union Pacific Steam Shop in Cheyenne on Aug. 5 and will return home Tuesday after making more than 90 whistle-stops in small communities and public-display events in five major cities.

Credit: Union Pacific
Big Boy No. 4014

Sunday, Sept. 5

  • 10 a.m. — Kit Carson
    • Young Street Crossing
  • 12:15 p.m. — Hugo
    • 4th Avenue Crossing
  • 2:45 p.m. — Deer Trail
    • Burton Street Crossing
  • 4 p.m. — Strasburg
    • Monroe Street Crossing
  • 7 p.m. — Arrive in Denver

Monday, Sept. 6

  • 9 a.m. to 3 p.m. — Denver
    • Big Boy on display at 39th & Wynkoop Street.

Tuesday, Sept. 7

  • 8 a.m. — Depart Denver
  • 10:40 a.m. — La Salle
    • 1st Avenue Crossing
  • 11:25 a.m. — Greeley
    • 10th Street Crossing

The Denver public display will also feature interactive booths, exhibits on railroading and model railroading, souvenirs and more.

Big Boy No. 4014 was delivered to Union Pacific in December of 1941, built to cross the Wasatch Mountain Range east of Ogden, Utah. Union Pacific said No. 4014 was retired in 1961 after traveling a little over a million miles, reacquired by Union Pacific in 2013 and restored to service in 2019.

Credit: Union Pacific
Big Boy No. 4014

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