Utah State Route 45

State Route 45
Route information
Maintained by UDOT
Length	40.028 mi[1] (64.419 km)
Existed	1925 as a state highway; 1927 as SR-45–present
Major junctions
South end	Dragon Road near Bonanza
North end	US 40 in Naples
Location
Country	United States
State	Utah
Highway system
Utah State Highway System Interstate US State Minor Scenic
← SR-44 → SR-46

State Route 45 (SR-45) is a state highway in the U.S. state of Utah. It runs from Dragon Road south of Bonanza in Uintah County north to US-40 in Naples, south of Vernal. The route spans 40.03 miles (64.42 km) south–north.

The route was added to the state highway system in 1925 and numbered in 1927, originally running from US-40 southeast to the Colorado state line. Subsequently, the highway was moved to a new road in 1943, truncated to Bonanza in 1968, and again moved and extended in 1982.