Idaho State Highway 81
| Route information | ||||
|---|---|---|---|---|
| Maintained by ITD | ||||
| Length | 33.978 mi (54.682 km) | |||
| Existed | 1972–present | |||
| Major junctions | ||||
| South end | SH-77 in Malta | |||
| SH-77 in Declo | ||||
| North end | US 30 in Burley | |||
| Location | ||||
| Country | United States | |||
| State | Idaho | |||
| Counties | Cassia | |||
| Highway system | ||||
| ||||
| ||||
State Highway 81 (SH-81) is a state highway in Cassia County, Idaho. The highway runs for 33.978 miles (54.682 km) from SH-77 in Malta to U.S. Route 30 (US-30) in Burley. It also has a short spur route connecting the highway to Interstate 84 (I-84) at the Yale Interchange.
Prior to its designation as SH-81 in 1972, the highway was part of U.S. Route 30S (US-30S), a multi-state national highway that traveled from Burley to Granger, Wyoming.