Mountain Directory iPhone/iPad App

I have both East and West. They're both pretty old(2002), but the mountains haven't moved very much since then. Mine cost $15 each, but I could have skipped the East directory. It does show you where the passes through the Appalachians are. But the Appalachians aren't nearly as high as the Rockies.
I use them for planning my routes - before I ever leave home. I'm too old for surprises.