While most national parks require visitors to pay an entry fee — some of the most popular parks charge up to $35 for each ...

Seniors can get into any national park for free with a Senior Lifetime Pass. The pass has a one-time fee of $80 and grants ...

Standard passes for Michigan parks range from free to $25, an annual pass is $45. America the Beautiful passes — offering entry to all parks — range from free for certain groups to $80 per year.