The max limit is a rough guess. If you have good beta on runnable levels, please add a comment.
Though usually listed as class 4 this is an easy slide down a wide tongue in the right center, at least at moderate levels. By the time the horizon line disappears you'll be committed, so you'll probably want to scout from the either side, with a river left scout giving a better view but requiring a more committed ferry to get back to the main drop.