Utah State Route 123 is a state highway

State highway

State highway, state road or state route can refer to one of three related concepts, two of them related to a state or provincial government in a country that is divided into states or provinces :#A...

 in the U.S. state

U.S. state

A U.S. state is any one of the 50 federated states of the United States of America that share sovereignty with the federal government. Because of this shared sovereignty, an American is a citizen both of the federal entity and of his or her state of domicile. Four states use the official title of...

 of Utah

Utah

Utah is a state in the Western United States. It was the 45th state to join the Union, on January 4, 1896. Approximately 80% of Utah's 2,763,885 people live along the Wasatch Front, centering on Salt Lake City. This leaves vast expanses of the state nearly uninhabited, making the population the...

. Spanning 11.4 miles (18.3 km), it connects the cities of Sunnyside

Sunnyside, Utah

Sunnyside is a city in Carbon County, Utah, United States. The population was 404 at the 2000 census.-Geography:Sunnyside is located at ....

 and East Carbon

East Carbon, Utah

East Carbon is a city in Carbon County, Utah, United States. The population was 1,393 at the 2000 census. East Carbon was incorporated on July 23, 1973, from the merger of the two struggling mining towns of Dragerton and Columbia.-Geography:...

 with US-6 / US-191 in Carbon County

Carbon County, Utah

Carbon County is a county located in the U.S. state of Utah. Named for the major coal deposits in the area, the county seat and largest city, is Price. Carbon County is the second largest natural gas producer in Utah , with 94 billion cubic feet produced in 2008. As of 2010 the population was...

.

Route description

State Route 123 begins at Sunnyside Junction on US-6/US-191, about 15 miles southeast of Price

Price, Utah

Price is a city in Carbon County, Utah, United States. The city is home to the USU-College of Eastern Utah, as well as the large USU Eastern Prehistoric Museum affiliated with the college. Price is located within short distances from both Nine Mile Canyon and the Manti-La Sal National Forest...

. It heads east, passing through East Carbon just before reaching Sunnyside at the base of the Book Cliffs

Book Cliffs

The Book Cliffs are a series of mountains and cliffs in western Colorado and eastern Utah, in the western United States. They are so named because many of them have the triangular appearance of a book that has been opened up, then turned on its sides and set to rest on the open sides of the book,...

. The route continues through Sunnyside, turning to the northeast and terminating shortly after it enters Whitmore Canyon.

History

The road from Sunnyside Junction through Sunnyside to Columbia was added to the state highway system in 1931, initially numbered SR-124 but changed to SR-123 in 1933. The route was shortened in 1935 by moving the eastern terminus back into Sunnyside, and splitting off the portion from Sunnyside to Columbia as SR-124.

Major intersections