I have not checked travel cooridore maps since they redid some areas....but there is a road ride in from Moose Creek that can get you in therealmost all the way up topn and you can pick your way to the upper basin, from there, there is a deceoptive amount of riding...I think it is trail 6964....or you can go up the canyon, Portal Creek Road, and there is a path that takes off to the left and up to intercpet that trail...
it is not anywhere near as open and big country as taylors and other areas, but on good pow days or really busy weekends, it doenst get hammered as much, and it is closer to Bzn...