October 8th, seniors 62 and up can get access to over 400 National Parks for free. Plus, seniors can also obtain a voucher for a free lifetime pass to participating National Park Service sites.
You will need to head over here to claim your voucher. If you plan on taking advantage of the lifetime offer, I would not wait. Those are limited and quite a bit have already been claimed.
**If you have a 4th grader, they can also score free admission. This is for the 2015-2016 school year and includes the child’s family.