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 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.
166,800 electric vehicle
registrations in Washington in 2023, up from 114,600 in 2022.
87 wetland compensation sites
actively monitored on 918 acres in 2023.
25,000 safe animal crossings
in the Snoqualmie Pass East Project area since 2014.