The National Park Service has reduced the number of free days at its more than 400 locations from 10 in 2017 to four in 2018.
The entrance fee waiver for the free days does not cover amenity or user fees for activities such as camping, boat launches, transportation or special tours, according to a news release.
Perhaps the best deal to enjoy national parks and other federal lands is to purchase an $80 annual America the Beautiful National Parks and Federal Recreational Lands Pass, which allows unlimited entrance to more than 2,000 federal recreation areas.