Thought this link, which connects to a site with over 1,000 National Park Service maps, would be of interest to members of this forum:
http://npmaps.com/
The site is not officially affiliated with the National Park Service but has quite a few maps from the agency's repertoire collected in one place.
That's good, since some time ago, the NPS inexplicably switched their online maps to "park tiles" which are much less detailed and user friendly than their previous zoomable unigrid maps. Thankfully, most significant sites are reversing that decision, but hopefully this website fills in the current gaps.
A good chunk of my map collection is devoted to National Park Maps. I'm extremely interested in the historical maps, but any of them are awesome.
In 1997, on my honeymoon, the wife and I went to the Dept. of Interior building, just to get one copy of each National Park Map. 'twas a thing of Beauty.
Nice! I actually have a box full of NPS maps in the garage. I still need to set up my display for all the National Parks. Usually I ask for two copies at gates or visitor centers. I want to say I have at least 20 from Yosemite alone.