Visit

Visit

Hours and location

Open Tuesdays through Saturdays, 11 a.m. to 5 p.m. (closed on state holidays)
Open until 8 p.m. on the first Thursday of each month during the Pioneer Square Art Walk.

Admission is free.

Milepost 31 is located at 211 First Ave. S. (between South Washington and South Main streets) in Seattle.

Milepost 31 is located at 211 First Ave. S.

For more information

Email viaduct@wsdot.wa.gov or call 1-888-AWV-LINE (298-5463).

Looking for parking?

We’ve launched a parking website to help visitors track down one of thousands of parking spaces within walking distance of shopping, restaurants, attractions and more. The site includes rates, hours and directions to specific lots or garages.

ADA and accessibility

Milepost 31 is ADA accessible. Please ring the designated buzzer when you arrive. Milepost 31 is ADA accessible. There is one step at the main entrance and we have a portable wheelchair ramp available for visitors who may need it. Please ring the buzzer and Milepost 31 staff will be happy to assist visitors.

Additional accommodation requests for people with disabilities can be made by contacting the WSDOT Diversity/ADA Affairs team at wsdotada@wsdot.wa.gov or by calling toll free, 855-362-4ADA (4232). Persons who are deaf or hard of hearing may make a request by calling the Washington State Relay at 711.