Washington State Route 278
SR 278 is highlighted in red. | ||||
| Route information | ||||
| Auxiliary route of SR 27 | ||||
| Maintained by WSDOT | ||||
| Length | 5.50 mi (8.85 km) | |||
| Existed | 1991–present | |||
| Tourist routes | Palouse Scenic Byway | |||
| Major junctions | ||||
| West end | SR 27 in Rockford | |||
| East end | SH-58 at Idaho state line near Rockford | |||
| Location | ||||
| Country | United States | |||
| State | Washington | |||
| Counties | Spokane | |||
| Highway system | ||||
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State Route 278 (SR 278) is a 5.50-mile (8.85 km) long state highway serving rural Spokane County in the U.S. state of Washington. The highway begins at SR 27 in Rockford and travels east to the Idaho state line, where it becomes Idaho State Highway 58. SR 278 was established in 1991 to serve the Coeur d'Alene Reservation in Idaho and used the route of an old gravel road that dates back to the 1930s.