The Castle 2 Castle Swim is a one mile open water sea swim across the mouth of the River Fal. The swim starts at Pendennis Castle in Falmouth and finishes at St Mawes Castle on the Roseland Peninsula.The Castle 2 Castle Swim is a one mile open water sea swim across the mouth of the River Fal. The swim starts at Pendennis Castle in Falmouth and finishes at St Mawes Castle on the Roseland Peninsula.

All details plus entry form here