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Big Boy goes on tour: Here's when the massive steam engine comes in Colorado

The Big Boy Heartland of America Tour that started Wednesday will make two whistle stops in Colorado.

CHEYENNE, Wyo. — Big Boy No. 4014 kicked off its Heartland of America Tour on Wednesday that will bring the world's largest steam engine to Colorado for two whistle stops this fall.

Union Pacific’s famed Big Boy No. 4014 will pass through nine states, including Colorado, on its fall 2024 tour

The fall tour will make two whistle stops in Colorado but won't be stopping for a longer display visit here. The whistle stops will be: 

  • Monday, Oct. 21 from 3:45 p.m. to 4:15 p.m. at the Monroe St. Crossing in Strasburg
  • Wednesday, Oct. 23 from 12:35 p.m. to 1:05 p.m. at the 10th St. Crossing in Greeley

The Heartland of America Tour began Wednesday, Aug. 28 in Cheyenne, Wyoming. The locomotive will travel through Nebraska, Iowa, Illinois, Missouri, Arkansas, Texas, Oklahoma and Kansas before concluding its tour in Colorado. 

Credit: Union Pacific
Union Pacific’s famed Big Boy No. 4014 will pass through nine states, including Colorado, on its fall 2024 tour.

The 1.2 million pound Big Boy steam locomotive was built in the 1940s to conquer mountains while carrying equipment during World War II. 

Big Boy No. 4014 was delivered to Union Pacific in December 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.

The Cheyenne-based Big Boy No. 4014 was last in Denver in July 2022 at Denver's Union Station.  

Twenty-five Big Boy locomotives were built for Union Pacific, No. 4014 is the world’s only functioning Big Boy.

Eight Big Boys remain throughout the United States. Big Boy No. 4005 is on display at the Forney Museum of Transportation in Denver. Big Boy No. 4004 is on display at Holliday Park in Cheyenne.

> Below: Watch when Big Boy came through Strasburg in 2019:

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