You can get into the national parks for free this week: Here's when

(NEXSTAR) — For five days this year, all national parks will be offering free admission to all visitors. One of those special days is nearly upon us.
The National Park Service announced the 2023 free days late last year. There are more than 400 parks, monuments, seashores, and other NPS lands, the majority of which do not require an entrance fee. For the roughly 100 that do, these free admission days open the gates to everyone.
We've already had two free days this year: Jan. 16, which is M