In reply to RX-78:
I haven't done much running around Porlock, but I have done plenty of walking. The coastal path west of Porlock Weir towards Colbone can get boggy, but never known the stretch from Minehead to Porlock to be boggy or around Lyton and Lynmouth. The paths around the tops like Dunkery, Bossington and Selworthy are usually pretty dry.