State Highway 78 | ||||
|---|---|---|---|---|
 SH-78 highlighted in red | ||||
| Route information | ||||
| Maintained by ITD | ||||
| Length | 99.720 mi [1] (160.484 km) | |||
| Major junctions | ||||
| West end |  SH-55 in Marsing | |||
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| East end |  I-84 BL in Hammett | |||
| Location | ||||
| Country | United States | |||
| State | Idaho | |||
| Counties | Owyhee, Elmore | |||
| Highway system | ||||
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State Highway 78 (SH-78) is a state highway in Idaho from SH-55 in Marsing to I-84 Business Loop in Hammett
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]
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]
| 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 | |
| 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 BL – Mountain Home, Boise, Twin Falls | Overlap with I-84 Bus. |
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
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Bruneau is an unincorporated community in Owyhee County in the southwestern part of the U.S. state of Idaho. The mouth of the Bruneau River is to the northwest and Bruneau Sand Dunes State Park is to the east. As of 2014, Bruneau has a population of 552.
State Highway 51 (SH-51) is a state highway in southwestern Idaho from Mountain Home south to the Nevada border, where it continues as State Route 225 to Elko. It is the major north–south road in Owyhee County.
State Route 128 (SR 128) is a Washington state highway located in Asotin and Whitman counties, west of the Idaho state line. The 2.30-mile (3.70 km) long route runs north from U.S. Route 12 (US 12) in Clarkston to cross the Snake River and turn east after intersecting SR 193 to terminate at State Highway 128 (SH 128) on the Idaho state line. The highway was originally created in 1964 on a Pomeroy–Clarkston route, replacing Secondary State Highway 3K (SSH 3K), which had been established in 1937; in 1991, the route was changed to its present form.
State Route 129 (SR 129) is a state highway in Asotin County, Washington, United States. It travels north–south at the southeastern corner of the state, connecting with Oregon Route 3 (OR 3) at the Oregon state line south of Anatone. The 43-mile (69 km) highway then follows the Snake River, which marks the Idaho state border, north to Clarkston and terminates at U.S. Route 12 (US 12). SR 129 also has a short spur route that connects to a separate intersection with US 12 in Clarkston.
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State Highway 55 (SH-55) is an Idaho highway from Marsing to New Meadows, connecting with US-95 at both ends.
U.S. Route 93 (US-93) is a north–south U.S. Highway in the U.S. state of Idaho.
State Highway 75 is a two-lane highway that travels through the Sawtooth Valley of central Idaho. The highway's southern terminus is in Shoshone, and its northern is near Challis. It is designated as one of Idaho's scenic byways and provides access to Sawtooth National Recreation Area. It primarily follows the Big Wood River in the south and the main Salmon River in the north, divided by Galena Summit.
State Highway 21 (SH-21), also known as the Ponderosa Pine Scenic Byway, is a state highway in Idaho. It runs from Boise to Stanley, primarily as a two-lane road. With two-thirds of its length in Boise County, it passes by historic Idaho City and the village of Lowman to the western edge of the Sawtooth Mountains, then along their northern boundary to Stanley.
State Highway 53 (SH-53) is a 14.240-mile-long (22.917 km) state highway serving Kootenai County in the U.S. state of Idaho. SH-53 travels northeast from Washington State Route 290 at the Washington state border near Hauser to a short concurrency with SH-41 in Rathdrum. From Rathdrum, the highway continues east to end at U.S. Route 95 (US-95) north of Hayden. The Hauser to Rathdrum segment first appeared on a map in 1926, while the continuation of the route to the Hayden area appeared in 1937, completing an unnumbered state highway. SH-53 was designated in 1953 after all unnumbered state highways were assigned numbers.
State Highway 37 (SH-37) is a state highway in Power County in southern Idaho, United States that spans 31.231 miles (50.261 km) north-south from the Oneida–Power county line to Interstate 86 (I-86).
State Highway 45 (SH-45) is a 17.985-mile-long (28.944 km) state highway in Idaho. It runs from SH-78 to Interstate 84 Business in Nampa.
State Highway 46 (SH-46) is a 57.222-mile-long (92.090 km) state highway in southern Idaho that runs north–south across the Magic Valley region. It connects U.S. Route 30 (US-30) in Buhl to Interstate 84 (I-84) in Wendell, US-26 in Gooding, and US-20 east of Fairfield.
State Highway 50 (SH-50) is a 8.092-mile-long (13.023 km) state highway in the U.S. State of Idaho. SH-50 starts at U.S. Route 30 (US-30) before connecting to Interstate 84 (I-84) and ending at SH-25. It provides eastern access to the city of Twin Falls from I-84.
State Highway 67 (SH-67) is a state highway in Elmore County, Idaho. It connects the Mountain Home Air Force Base to SH-51 in the city of Mountain Home.
State Highway 167 (SH-167) is a state highway in Idaho from SH-78 in Grand View to SH-67 near Mountain Home Air Force Base.
