Washington 542
| Termini | I-5 (exit 255) in Bellingham to Austin Pass at the foot of Mount Baker |
| Length | 57.2 miles |
| "Where does it go?" | WA-542 is the Mount Baker Highway. It runs from Bellingham to Mount Baker and Austin Pass. |

Highways of
Washington State - State Route 542
Wikipedia -
Washington State Route 542
Washington
State Legislation - Route 542