I'm level 36 right now, about to get to the final fight. Probably going to be level 37 after seeing the credits, then level 38 or 39 by the time I beat Terramorphous. I haven't done much besides every side mission so it shouldn't be hard to gain another 10+ level during the next playthru that will be harder since I assume you'll be doing True Vault Hunter Mode too.
oh hey LC, how are you going to face Terramorphous or Vermivirous? Verm can one or two shot even the most pimped out level 50 players. Plus it has twice the health of Terramorphous. Pretty much the ultimate raid boss.