Does anyone know of any listed permanents that go through Dartmoor?
No, but I once did a very nice 300km DIY that went round Dartmoor (Kingscombe-Exeter-Bude-Fowey), complete with views of the moor and sea, ferry crossings and everything. The Exter-Bude-Fowey stages were lifted whole from the K&SW routesheet, and not the flat bit. Actually, none of it was the flat bit; I certainly didn't feel short changed on the climbing front.
Passing through Lostwithiel at dusk, several hours behind schedule, I asked a native if I was good for Fowey. "Yes", she said, pausing before adding, "It's up the hill", and then, after looking me over, "It's a big hill". "Aren't they all?", I sighed.
Actually, this would make a great Perm/Calendar for those that don't feel
man enough up to the full K&SW 600. Definately worth travelling for.