Interstate 90 in Idaho

Interstate 90 Main route of the Interstate Highway System
Maintained by ITD
Length:	73.888 mi[1] (118.91 km)
West end:	I-90 at Washington state line
Major junctions:	US-95 in Coeur d'Alene SH-4 in Wallace
East end:	I-90 at Montana state line
State Highways in Idaho < US-89 US-91 >

In the U.S. state of Idaho, Interstate 90 has a small routing in the panhandle, just under 74 miles (120 km). Traveling east from Spokane, Washington, I-90 passes through Post Falls and Coeur d'Alene, over Fourth of July summit, and through the Silver Valley before entering Montana at Lookout Pass.

Route description

History

The small town of Wallace in the Silver Valley still prides itself on having what was the last stop light on I-90. Its downtown has many historical buildings, which would have been wiped out by the original planned route of the freeway, so in 1976, city leaders had the downtown placed on the National Register of Historic Places. As a result, the federal government was forced at great expense to reroute the freeway to the northern edge of downtown and elevate it. That section of I-90 opened in September 1991^[2]. A bicycle path is routed beneath part of that segment. Prior to the move to the viaduct I-90 would go from a freeway at the western edge of Wallace before turning to surface streets and following the main arterial through town, upon reaching the eastern edge of the town the became a limited access divided highway once again.

The interstate also was routed along Lake Coeur d'Alene as a surface street before the Veterans Memorial Centennial Bridge was completed in the heights above the lake.

Interstate 90 on the 1991 viaduct in Wallace, Idaho.

Exit list

County	Location	Mile	#	Destinations	Notes
Kootenai		2.08	2	Pleasant View Road
	Post Falls	4.63	5	I-90 Bus. east (Spokane Street) – City Center
		5.45	6	I-90 Bus. west (Seltice Way) – City Center	Westbound exit and eastbound entrance
		7.13	7	SH-41 – Rathdrum, Spirit Lake
	Coeur d'Alene	11.29	11	I-90 Bus. east (Northwest Boulevard) – City Center
		12.04	12	US-95 – Sandpoint, Moscow
		12.56	13	4th Street
		13.56	14	15th Street
		14.78	15	I-90 Bus. west (Sherman Avenue) – Fernan, City Center
		16.88	17	Mullan Trail Road
		22.06	22	SH-97 – Harrison, St. Maries
		28.38	28	Fourth of July Pass Recreation Area
		34.03	34	SH-3 – Rose Lake, St. Maries, Harrison
		39.02	39	Old Mission State Park
		40.10	40	Cataldo
Shoshone		43.02	43	Kingston
		45.26	45	Pinehurst, Smelterville
		47.69	48	Smelterville, Shoshone County Airport
	Kellogg	49.72	49	Bunker Avenue – Silver Mountain
		50.32	50	Hill Street	Eastbound exit and westbound entrance
		50.55	51	Division Street – Wardner	No westbound entrance
		54.19	54	Big Creek
	Osburn	57.04	57	I-90 Bus. east – Osburn
		59.55	60	I-90 Bus. west – Silverton, Osburn
	Wallace	60.99	61	I-90 Bus. east – Wallace
		61.95	62	I-90 Bus. west / SH-4 – Wallace, Burke
		64.27	64	Golconda District
		65.35	65	Compressor District
		66.50	66	Gold Creek	Eastbound exit and entrance
		67.35	67	Morning District, West Mullan
	Mullan	68.10	68	I-90 Bus. east – Mullan	Eastbound exit and westbound entrance
		68.91	69	I-90 Bus. west – Mullan, East Mullan

References

Interstate 90
Previous state: Washington	Idaho	Next state: Montana

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