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Provo Subdivision

Utah Division
Denver & Rio Grande Western Railroad
Rio Grande Western logo (1880s).png
D&RGW Castle Gate steam train approaching.jpg
Castle Gate in the Price Canyon, ca. 1929
Locale Utah, western Colorado
Dates of operation 1882–1992
Successor Southern Pacific Lines
Track gauge 4 ft 8 12 in (1,435 mm) standard gauge; originally 3 ft (914 mm)
Length 332.3 miles (534.8 km)

The Utah Division of the former Denver & Rio Grande Western Railroad (D&RGW) is a rail line that connects Grand Junction, Colorado and Salt Lake City, Utah (formerly Ogden) in the Western United States. It is now incorporated into the Union Pacific Railroad (UP) system as its Green River and Provo Subdivisions, forming a portion of the Denver-Nevada Central Corridor. Daily passenger service is provided by Amtrak's California Zephyr, and the BNSF Railway and Utah Railway have trackage rights over the line.

The line dates back to the early 1880s, when the predecessors of the D&RGW completed a 3 ft (914 mm) narrow gauge line through the Royal Gorge, over Marshall Pass, through the Black Canyon of the Gunnison, across the Utah desert, and over Soldier Summit. It was rebuilt to standard gauge in 1890, and has since remained a through line, often serving as parts of larger networks including the Gould transcontinental system, Southern Pacific, and now the Union Pacific.


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