Washington State Parks and the Washington Departments of Fish & Wildlife (WDFW) and Natural Resources (DNR) offer several "free days" when a Discover Pass is not required to visit these lands. Free days apply only to day use (not overnight stays or rented facilities). Free days are valid at state parks and Washington State Departments of Natural Resources and Fish & Wildlife lands. Sno-Park permits are still required on free days at designated Sno-Parks during the winter season.