Idaho State Highway 53

SH-53 begins at the Washington state border southwest of Hauser at the eastern terminus of Washington State Route 290, which serves Spokane, Washington. Trent Road travels northeast, paralleling the Burlington Northern Santa Fe railroad through farmland and several small suburban communities towards Rathdrum. The highway serves the northern area of the city, passing strip malls and businesses, to an intersection with SH-41. At the intersection, SH-53 turns southeast and begins a short concurrency with SH-41 to cross the railroad via an overpass. The highway splits from SH-41 near Lakeland High School and travels due east through a commercial district.[3] From the commercial district, the roadway travels towards farmland and sharply turns north before cutting back southeast over a UPRR railroad line. After the overpass, SH-53 ends at a signalized intersection with US-95 north of Hayden.[4] The Idaho Transportation Department has plans to straighten the east end of the highway and replace the signalized intersection with an interchange by the end of 2020.[5]

SH-53 first appeared as a roadway from Hauser to Rathdrum in a 1926 map of Idaho.[6] By 1937, the road was extended east to US-95 north of Hayden and became an unnumbered state highway.[7] The highway was officially designated as SH-53 after a meeting of the Idaho Board of Highway Directors on July 25, 1953 that approved a number for all unnumbered state highways.[2][8]

The entire route is in Kootenai County.

Location	mi[1]	km	Destinations	Notes
​	0.000	0.000	SR 290 west (Trent Avenue) – Spokane	Washington state border
Rathdrum	9.460	15.224	SH-41 north – Oldtown	West end of SH-41 overlap
	9.660	15.546	SH-41 south – Post Falls	East end of SH-41 overlap
​	14.240	22.917	US 95 – Lewiston, Coeur d'Alene, Sandpoint	Interchange
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus