I'm not sure exactly how high it is, but others have been going down without trouble. The Station Master has all the locals staying away so that you all can work on the coral without us stopping you, and as far as they know I'm still a part of that group. I can't really sneak a peek even if I want to.

[Trolls are supposed to be tougher than humans, aren't they? She's sure that Karkat can manage.]