Black_Diamond
I think I've mistaken that path for a legitimate trail before. It's not really a safe trail that people should take, and it's not on the official map at https://parks.sccgov.org/sites/g/files/exjcpb961/files/Uvas%20Canyon%20Guide%20Map.pdf either. I suspect that people don't want to take the long route, and take this shortcut instead. I recommend contacting the park ranger to see if it can be made into a safe trail or have it blocked off with markers.