Interstates & state routes

View interactive maps of all the mileposts and Interstate exits on the Washington state highway system, or download and print PDF maps of the Washington state highway system.

Milepost markers map application

Milepost Marker Map Application displays milepost information along Interstates, US Highways, and State Routes. Information is provided to to the nearest 1/10th of a mile.

Interstate highway exits map application

Interstate Exits Map Application displays Interstate exit ramp location information. Information is shown at the beginning of exit ramps on Interstate routes and provide details about the road the ramp exits from and the road it exits to in addition to the exit numbers where available.

Printable state highway maps

You can use the printable maps to assist with trip planning and travel.

8,683 animals crossed the Snoqualmie Pass East Project area

as recorded by WSDOT and partners in 2020 and 2021.

46% increase in Amtrak Cascades ridership to 251,000 passengers

in 2021 compared to 172,000 in 2020.

Nine wetland and stream mitigation sites across 32.7 acres added

to our monitoring program in 2021 to help offset climate change impacts.