Former State Route 8A was a two-part state highway

State highway

State highway, state road or state route can refer to one of three related concepts, two of them related to a state or provincial government in a country that is divided into states or provinces :#A...

 in the U.S. state

U.S. state

A U.S. state is any one of the 50 federated states of the United States of America that share sovereignty with the federal government. Because of this shared sovereignty, an American is a citizen both of the federal entity and of his or her state of domicile. Four states use the official title of...

 of Nevada

Nevada

Nevada is a state in the western, mountain west, and southwestern regions of the United States. With an area of and a population of about 2.7 million, it is the 7th-largest and 35th-most populous state. Over two-thirds of Nevada's people live in the Las Vegas metropolitan area, which contains its...

, running from California State Route 299

California State Route 299

State Route 299 is a state highway in the U.S. state of California that runs across the northern part of the state. It runs from Arcata on the Pacific Ocean to the border with Nevada. Between Arcata and Redding, Route 299 junctions with State Route 96 and is briefly co-signed with State Route 3. In...

 in a general easterly and southeasterly direction via Vya

Vya, Nevada

Vya, Nevada is a small ghost town located in Washoe County, in northwestern Nevada. It is to the east of the California state line, about 10 miles plus. Not much remains of the small town, which essentially died in the 1920s. Just two wooden buildings can still be seen—the Vya Post Office and Library...

 and Denio

Denio, Nevada

Denio, Nevada is an unincorporated community that lies on the Nevada-Oregon state line in Humboldt County, Nevada and Harney County, Oregon, in the United States. The community is also known as Denio, Oregon. There was formerly a Denio, Oregon post office north of the state line. Most of the town...

 to US 95

U.S. Route 95 in Nevada

In the U.S. state of Nevada, U.S. Route 95 is a major U.S. highway traversing the state from north to south directly through Las Vegas and providing connections to both Carson City and Reno...

 north of Winnemucca

Winnemucca, Nevada

-Demographics:As of the census of 2000, there were 7,174 people, 2,736 households, and 1,824 families residing in the city. The population density was 867.5 people per square mile . There were 3,280 housing units at an average density of 396.6 per square mile...

, and south from US 40 at Battle Mountain

Battle Mountain, Nevada

Battle Mountain is an unincorporated community and census-designated place in Lander County, Nevada, United States. The population was 2,871 at the 2000 census. Though it has no legal status as a municipality, it still functions as the county seat of Lander County...

 via Austin

Austin, Nevada

Austin is a small, unincorporated community located in Lander County, Nevada, in the United States. As of 2004, its population is approximately 340. It is located on the western slopes of the Toiyabe Range at an elevation of . U.S...

 to US 6 near Tonopah

Tonopah, Nevada

Tonopah is a census-designated place located in and the county seat of Nye County, Nevada. It is located at the junction of U.S. Routes 6 and 95 approximately mid-way between Las Vegas and Reno....

. It was a branch of State Route 8, which followed US 95 north from US 40 at Winnemucca to Oregon

Oregon

Oregon is a state in the Pacific Northwest region of the United States. It is located on the Pacific coast, with Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern...

. The part northwest from US 95 towards the Oregon state line later became State Route 140

Nevada State Route 140

State Route 140 is a two-lane state highway in Humboldt County, Nevada. It serves a sparsely-populated section of the state, connecting northwestern Nevada to southern Oregon...

, part of the Winnemucca to the Sea Highway. In the late 1970s renumbering, the north–south portion became State Route 305

Nevada State Route 305

State Route 305 is a state highway in Lander County, Nevada. It is the only state highway to connect the southern and northern areas of the county. It runs north from U.S. Route 50 at Austin to Battle Mountain, where it crosses Interstate 80 and ends at State Route 304.-Route description:State...

 (Battle Mountain to Austin) and State Route 376

Nevada State Route 376

State Route 376 is a state highway in central Nevada in the United States. It connects U.S. Route 6 near Tonopah north to U.S. Route 50 near Austin...

 (Austin to Tonopah), but the portion from SR 140 west to California did not remain in the state highway system. (SR 140 was to be renumbered to State Route 291, but this was not carried through.) However, signs remain on that segment, and so SR 8A still de facto connects SR 140 with California.

Major intersections

County	Location	Destinations	Notes
Washoe			State line
	Vya		West end of SR 34 overlap
			East end of SR 34 overlap
Humboldt		– Adel, Lakeview, Denio, Winnemucca