In reply to adstapleton:
> (In reply to allyrocke)
>
> It's ancient Anglo-Saxon for Derbyshire, just a coincidence that it's also the same word used to denote the top of something.
>
> FACT.
I thought it was named after the inhabitants of the area who were known as The Pics, so Peak District (both words traditionally singular, of course) is just a corruption of that.
Still not sure if the op wasn't peeping out from under his bridge, though....