Washington 278
| Termini | WA-27 in Rockford to ID-58 at the Idaho border east of Worley ID |
| Length | 5.5 miles |
| "Where does it go?" | Beginning at WA-27 in Rockford, SR 278 heads east to the Washington-Idaho state line, towards Worley, ID, where ID-58 begins. |

| EB Miles | Eastbound down | Westbound up | WB Miles | Google™ | Multiplex | Near City or Town |
County |
| 0.0 |
![]() Railroad St |
5.5 |
|
Emma St | Rockford | Spokane | |
| 5.5 |
![]() |
0.0 |
|
E Hoxie Rd | |||
Highways of
Washington State - State Route 278
Washington
State Legislation - Route 278