In reply to Dom Whillans:
> (In reply to El-Mariachi)> Um, you reckon there's not many quarries in South Wales? Try running up and down between the two Gap quarries. Run up and down between the pub and the top of Morlais. Run between Llangattock village and the quarries (or simply run along the top of the escarpment then run back along the bottom.
Methyr Mawr sand dunes, it's good enough for amateurs and professional alike. Plus less likely to damage you!
Plus, if you find that a bit too easy, you could always run along to Porthcawl and back, only go out into to the sea until you're up to your nadds, then start running.