National has two main lines: river left has a fairly straightforward "S" turn, catching a tongue just left of a truly impressive hole. River right is the Boof Line, which is one reason that spectators congregate. Miss that boof, and the hole's gonna mess you up. Though the hole does let go of the inverted boater, many good boaters lose their cool and go for a swim here (Lucky for them, it's one of the few places on the Upper Yough where a swim is short and inconsequential). The rock on river right below the drop is a congregating place for play-dogs to get their fix of rock splats.
Hazard
V
Playspot
Rapid
IV
Playspot
III+
Hazard
IV+
Waterfall
III