I've been riding trails in Marin for a while now, and just use trailforks to look things up. there are a few black diamonds as well as double blacks that i see listed in the area (ex; 4 black diamonds, 1 double black) but i can't seem to actually find them on the map or search function. how do i get permission to view these? or is it just a typo?
Yes so many trails in the Marin area are not legal, so they are hidden on the map. It's on my todo list to have those trail counts not incude hidden trails.