Found Memorial Plaque

Today on a hike I found an attractive memorial plaque, in good condition, wrapped in a plastic bag. I left it where it was. I wonder if anyone here knows about it. I did not memorize the plaque, but it talked about "many great hunters who have passed through this area", referred to someone named "Jake" and a date in 1962, and listed a whole bunch of names, including several from a family named "Hathaway."

I'm interested to know if anyone knows about this specific plaque. If I don't hear anything, next time I am up there I will bring it down and put it in the sign in box. (I did not do that today because I thought I might be undoing someone's work in bringing it up there.)