Idaho State Highway 78

State Highway 78 marker

State Highway 78

Route information

Maintained by ITD

Length:

99.720 mi^[1] (160.484 km)

Major junctions

West end:

SH 55 in Marsing

SH 45
SH 167

SH 51

East end:

I-84 Business Loop in Hammett

Location

Counties:

Owyhee, Elmore

Highway system

State Highways in Idaho

←

SH 77

SH 79

→

State Highway 78 (SH-78) is a state highway in Idaho from SH-55 in Marsing to I-84 Business Loop in Hammett

Route description

SH-78 starts at the intersection with SH-55 in Marsing and provides access to sites south of the Snake River from there to Bruneau and a few along the north side via SH-167 from Grand View. SH-78 provides access to Bruneau Dunes State Park and itself crosses the Snake into Elmore County before reaching its eastern terminus at Hammett.^[1]

History

The basic route of today's SH-78 from Marsing to Bruneau was in place as early as the mid-1930s, mostly as unimproved roads with a few all-weather gravel segments near Bruneau, Grand View and north of Murphy (a segment originally part of SH-45), and some paved segments near Marsing as of the 1937 map.^[2]

Major junctions

County	Location	mi^[1]	km	Destinations	Notes
Owyhee	Marsing	0.000	0.000	SH 55 – Marsing, Nampa, Boise, Eagle	US-95 is about 2 miles (3.2 km) south on SH-55
		19.775	31.825	SH 45 north – Nampa
	Murphy	34.105	54.887	Silver City Road	National historic mining district and former Owyhee County seat about 25 miles (40 km) south
	Grand View	59.782	96.210	SH 167 north – Mountain Home AFB, Mountain Home	Access to Simplot feed lot, USAF Recreation Area at C. J. Strike Dam, Simco Road
		76.004	122.317	SH 51 south – Grasmere, Elko	Southern end of SH-51 overlap
	Bruneau	82.680	133.061	SH 51 north – Mountain Home	Northern end of SH-51 overlap
	Bruneau	84.360	135.764	Bruneau Dunes State Park	protected sand dunes
Snake River		94.664	152.347	Snake River Bridge Owyhee–Elmore county line
Elmore	Hammett	98.640– 99.720	158.746– 160.484	I-84 Business Loop – Mountain Home, Boise, Twin Falls	Overlap with I-84 Bus.
1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus

References

1 2 3 Staff (March 19, 2014). "State Highway 78 Milepoint Log" (PDF). Idaho Transportation Department. Retrieved February 3, 2015.
↑ Rand McNally and Company, Road map: Idaho, Mont., Wyo., published by Texaco, 1937

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