U.S. Route 30 in Idaho

U.S. Highway 30
US 30 highlighted in red
Route information
Maintained by ITD
Length	455.481 mi[1] (733.026 km)
Existed	1926 (1926)–present
Tourist routes	Thousand Springs Scenic Byway
Major junctions
West end	US 30 in Fruitland
Major intersections	US 95 in Fruitland I-84 near New Plymouth US 20 / US 26 near Caldwell I-184 in Boise US 93 near Filer I-84 / SH-24 in Heyburn I-86 near Declo I-15 BL / US 91 in Pocatello I-15 in Pocatello US 89 in Montpelier
East end	US 30 near Dingle
Location
Country	United States
State	Idaho
Counties	Payette, Canyon, Ada, Elmore, Gooding, Twin Falls, Cassia, Minidoka, Power, Bannock, Caribou, Bear Lake
Highway system
United States Numbered Highway System List Special Divided Idaho State Highway System Interstate US State
← SH-29 → SH-31

U.S. Route 30 (US 30) runs northwest–southeast across the southern half of lower Idaho for 455.481 miles (733.026 km). US 30 enters the state from Oregon across the Snake River in Fruitland and exits into Wyoming east of Dingle. US 30 runs through the large population centers of Boise, Twin Falls, and Pocatello, as well as a plethora of smaller communities from Fruitland to Montpelier. The Thousand Springs Scenic Byway is a picturesque section of US 30 in southern Idaho between the towns of Bliss and Buhl, dipping down into the Hagerman Valley and a canyon of the Snake River.

The highway has four extensive concurrencies with Interstate Highways: Interstate 84 (I-84) twice, I-86, and I-15. Outside of its Interstate concurrencies, the route is largely two-lane and rural outside of portions through major towns and cities.