september, 2023 Discover Pass Free Day 23sep8:00 am10:00 pmDiscover Pass Free Day8:00 am - 10:00 pm Event DetailsWashington State Parks Free Day in honor of National Public Lands Day. No Discover Pass required to visit a state park this day. Event Details Washington State Parks Free Day in honor of National Public Lands Day. No Discover Pass required to visit a state park this day. Time(Saturday) 8:00 am - 10:00 pm CalendarGoogleCal