Nevada State Route 320
| Caselton Mine Loop | ||||
SR 320 highlighted in red | ||||
| Route information | ||||
| Maintained by NDOT | ||||
| Length | 10.674 mi (17.178 km) | |||
| Existed | 1976–present | |||
| Major junctions | ||||
| Southeast end | US 93 south of Pioche | |||
| Northwest end | US 93 north of Pioche | |||
| Location | ||||
| Country | United States | |||
| State | Nevada | |||
| Highway system | ||||
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State Route 320 (SR 320) is a state highway in Lincoln County, Nevada, United States. Known as the Caselton Mine Loop, the highway is a loop route of U.S. Route 93 (US 93) near Pioche serving the Caselton Mining District.