State Route 266 is a west–east thoroughfare completely within Salt Lake County

Salt Lake County, Utah

Salt Lake County is a county located in the U.S. state of Utah. It had a population of 1,029,655 at the 2010 census. Its county seat and largest city is Salt Lake City, the state capital. It occupies Salt Lake Valley, as well as parts of the surrounding mountains, the Oquirrh Mountains to the west...

 in northern 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...

 that connects both sides of the I-215

Interstate 215 (Utah)

Interstate 215 , also known locally as the belt route or two-fifteen, is an auxiliary interstate in the U.S. state of Utah that forms a 270-degree loop around Salt Lake City and many of its suburbs...

 beltway. It is known as 4500 South and 4700 South along the route.

Route description

After its western terminus, SR-266 heads east to its western terminus, the only variation of the route being 4700 South veering two blocks to the north after SR-68 to become 4500 South.

History

The State Road Commission designated SR-266 in 1959 as a mostly-proposed roadway, connecting SR-68 and SR-71 with a planned interchange on I-15. The corresponding section of SR-174, just to the south, was removed from the state highway system, as it would not give access to I-15. The state legislature extended the route west and east to both sides of the I-215 loop in 1969.

Major intersections