Washington 900
| Termini | Martin Luther King Way S and S Boeing Access Rd in Seattle to I-90 (exit 15) in Issaquah |
| Length | 16.2 miles |
| "Where does it go?" | WA-900 is the main highway from south end of Seattle to the foothills. It runs through Tukwila, Renton and ends in Issaquah. |

Highways of Washington State - State Route 900
Washington State Highways - SR-900
Wikipedia - Washington State Route 900
Washington State Legislation - Route 900