Admission will be free to Washington state parks on Monday, Martin Luther King Jr. Day.
On most days a car must have a Discover Pass to park at a state park. The passes cost $30 for a year or $10 a day, plus transaction charges.
The free day is only for day use of state parks, not overnight stays. Sno-Park permits are still required at some parks.
The free day also does not extend to land managed by the Washington State Departments of Natural Resources and Fish and Wildlife.
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Find a state park to visit at bit.ly/WAparks.