Idaho State Highway 55

State Highway 55
SH-55 highlighted in red
Route information
Maintained by ITD
Length	148.701 mi[2] (239.311 km)
Existed	1967[1]–present
Tourist routes	Payette River Scenic Byway
Major junctions
South end	US 95 west of Marsing
Major intersections	I-84 / US 30 from Nampa to Meridian US 20 / US 26 in Eagle
North end	US 95 in New Meadows
Location
Country	United States
State	Idaho
Counties	Owyhee, Canyon, Ada, Boise, Valley, Adams
Highway system
Idaho State Highway System Interstate US State
← SH-54 → SH-57

State Highway 55 (SH-55) is an Idaho highway from Marsing to New Meadows, connecting with US-95 at both ends.

From Marsing it travels east to Nampa, Meridian, and Eagle, then north to Horseshoe Bend. SH-55 then climbs the Payette River to Banks, then its north fork to the Long Valley, through the towns of Cascade and McCall. After descending a narrow canyon to Meadows, SH-55 terminates in New Meadows at the junction with US-95.