Washington State Parks has announced the following free days in 2023, when the Discover Pass will not be required to visit a state park. Please note, free days apply only to day use (not overnight stays or rented facilities): Jan. 1 — First Day Hikes; New Year’s Day | Jan. 16 — Martin Luther King, Jr. Day | March 9 — Billy Frank Junior’s Birthday | March 19 — State Park’s 110th birthday | April 22 — Earth Day | June 10 — National Get Outdoors Day | June 11 — Free Fishing Day | June 19 — Juneteenth | Sept. 23 — National Public Lands Day | October 10 — World Mental Health Day | Nov. 11 — Veterans Day | Nov. 25 — Autumn day