SR-21 highlighted in red | ||||
Route information | ||||
Maintained by UDOT | ||||
Length | 107.575 mi[1] (173.125 km) | |||
Existed | 1910 as a state highway; 1927 as SR-21–present | |||
Major junctions | ||||
West end | ![]() | |||
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East end | ![]() ![]() | |||
Location | ||||
Country | United States | |||
State | Utah | |||
Highway system | ||||
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State Route 21 (SR-21) is a state highway in western Utah, running for 107.575 miles (173.125 km) in Millard and Beaver Counties from the Nevada state line near Garrison to Beaver.