time for a new board?
Bah! Although I've half destroyed it going over rocks (I've determined that rocks are a normal thing at Lake Louise, it's not just an early season issue), I still have never had a base grind so there's tons of material left to work with.
I'll just get a shop to fix up the edges, fill the deepest gouges, and then grind the whole base. Should be good for another few years of rock usage!