My party is currently working their way through Castle Whiterock. It's designed to run a D&D 3.5 party from 1st to 15th. We're playing it using Pathfinder rules and are part-way through level 9 and just about to hit 10th level so we are roughly right on track for the advancement progression. Assuming our current rate we are expecting to be roughly 16th/17th when we finish up the dungeon. (Assuming we survive of course!)
It's been discussed that we'd like to continue with our party after Castle Whiterock but it doesn't look like there are any Dungeon Crawl Classics that are in the range of levels 16-20+. After doing some research I've managed to find a couple adventures for either Pathfinder (Coliseum Morpheon) or D&D (Bastion of Broken Souls). My DM isn't sold on either of these. I'm looking for other high level D&D/Pathfinder adventures in that range of 16-20 or more preferably some web resources that list adventures in this range.