Callao, Utah

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Unincorporated community
Callao is located in Utah
Callao is located in the US
Location of Callao in Utah
Coordinates: 39°53′52″N 113°42′31″W / 39.89778°N 113.70861°W / 39.89778; -113.70861Coordinates: 39°53′52″N 113°42′31″W / 39.89778°N 113.70861°W / 39.89778; -113.70861
Country United States
State Utah
County Juab
Settled 1860
Named for Callao
Elevation[1] 4,337 ft (1,322 m)
Time zone Mountain (MST) (UTC-7)
 • Summer (DST) MDT (UTC-6)
ZIP code 84034
Area code(s) 435
GNIS feature ID 1437516[1]

Callao (/ˈkæl/ KAL-ee-oh) is a small farming community in northern Snake Valley, along the border of Juab County and Tooele County, Utah, United States. It was part of the original Pony Express overland route, and was first called Willow Springs in 1860. E. W. Tripp, his wife, and their son were the first to establish residence there, in 1870. In 1895 it was decided that Willow Springs was too common a name, and a new name would be chosen. The name Callao was chosen because of a resemblance to Callao, Peru, suggested by an old prospector in the region who was working out of Gold Hill to the north.[2] It is unknown how the pronunciation changed from the Spanish [kaˈʝau] ('kah-YOW'). Little more than a group of ranches, Callao has a long history of being small and isolated.


According to the Köppen Climate Classification system, Callao has a semi-arid climate, abbreviated "BSk" on climate maps.[3]


  1. ^ a b U.S. Geological Survey Geographic Names Information System: Callao
  2. ^ Van Cott, John W. (1990). Utah Place Names. Salt Lake City, Utah: University of Utah Press. p. 62. ISBN 0-87480-345-4. 
  3. ^ Climate Summary for Callao, Utah

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