Saw my post but… what? Does nobody know or recognize this park? Don’t respond with “I don’t know” either because if you don’t know, don’t add anything.
if you have the original jpeg you can likely get the meta data from it and get something to give you a location. But otherwise it looks just like a park. It would fit nicely into what you find in the pacific northwest, but that doesn't mean it's here. Have you tried sharing it on a social site with a larger audience?