I am not good with researching and this one for me (and possibly many others) would be impossible to find. I uploaded your image to Google AI and it couldn't find it lol. After riding to it, I searched in Google and I still can't find what's special about it. Your hint of drawing it on the map is what made me find it. I'm not sure anything else would've done it.
In terms of hints, I work shift and only get a chance to ride from 11 pm - 6 am on my off days, and I'm not sure many people are willing to commit giving hints during that time frame. If the community wants to make it difficult and rely on hints, I won't be able to join in then. I'm guessing some other riders will lose interest as well. Waiting around for a hint reply vs actually just getting out and riding. But the needs of many outweigh the needs of the few. I'm just one of the few offering a different perspective because this game has helped me find some cool spots.
In terms of you having difficulty finding other tags, that's not fair to you especially if you consider yourself good at researching. I'd offer that we kindly remind people "The goal is to get out riding and have fun, so don’t place any go-to spots that are impossible to find, that defeats the purpose. Please try to include some identifier in the photo that makes it easy to locate within a reasonable amount of Google searching."
Cheers