Washington 401
| Termini | WA-4 in Naselle to US-101 at the Astoria bridge |
| Length | 12.1 miles |
| "Where does it go?" | WA-401 runs from Naselle to US-101 at the Astoria bridge that crosses the Columbia River to Astoria OR. |

| SB Miles | Southbound down | Northbound up | NB Miles | Google™ | Multiplex | Near City or Town |
County |
| 0.0 |
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12.1 |
|
Naselle | Pacific | ||
| 0.8 | Parpala Rd | 11.3 |
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| 12.1 | ![]() |
0.0 |
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Highways of
Washington State - State Route 401
Wikipedia -
Washington State Route 401
Washington
State Legislation - Route 401