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Steam - Union Pacific
Steam - Union Pacific (page 2)

ALCO 4-8-8-4
"Big Boy" UP 4004 on display in Cheyenne, WY, 8/08/02.  Although Big Boys are often credited with being the largest and most powerful locomotive built; in fact there are other loco's with superior numbers in any of several "size metrics". Eight Big Boys are preserved today.
 ALCO 4-8-8-4
UP 4017 on display at National Railroad Museum at Green Bay, WI, 9/17/01.  25 of these magnificent "Big Boy" locomotives were built between 1941 and 1944 for heavy freight service between Provo, UT, and Cheyenne, WY.  They were in service until 1959.
 ALCO 4-8-8-4
UP 4014 "Big Boy" returns to Cheyenne, WY, 5/08/14.  4014 was built in 1941, worked until 1959, and displayed in Los Angeles, CA, until early 2014.  This locomotive returned to operational in May 2019.
ALCO 4-8-8-4
  "Big Boy" UP 4023 on display in Omaha, NE, 5/07/16.
ALCO 4-8-4
 UP 814 at the Rock Island Depot Museum, Council Bluffs, IA, 5/06/16.  This locomotive was built in 1937.
Baldwin 2-8-0
UP 477 at Kenwood Park, Salina, KS, 5/09/24.
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