Free State Park Days 2024. In 2024 all national parks that charge admission, including the three national parks located in washingon state, will offer free entrance days to everyone on the following dates (with some state park free dates overlapping). On these days, visitors will not need a discover pass to park a vehicle at a.

March 19 — state parks’ 111th. Oregon state parks, us forest service, blm and other agencies to waive fees.