Evergreen gift ideas
How about a friend or relative who goes to national parks? Purchase a $50 National Parks Pass that allows access for one year after the first use in a park. The site says, "More than 80% of the proceeds from the sales of National Parks Passes go directly into supporting priority projects in national parks."
For $15 more, a Golden Eagle sticker on a national parks pass allows free access to the parks as well as sites managed by U.S. Fish & Wildlife Service, U.S. Forest Service and Bureau of Land Management.
Do friends and relatives ever visit state parks? For a directory of state park entrance passes, visit this site. It provides hyperlinks or phone numbers.