Photographer David Clifford has captured the world's most dogged runners doing what they love in the most remote and unforgiving environments.
Henry's, The Lizard, Cornwall
Henry's gives you a taste of 'traditional' Cornwall, the site's sub-tropical plants waving in the sea breezes, pretty coves washed by jade green waters within easy reach and an eclectic collection of artwork, 'standing stones', animated sculptures and murals scattered around the site. If you like your campsites to be basic, welcoming and in a glorious setting you can't go far wrong in this lovely corner of Cornwall.
Local highlight: the National Seal Sanctuary in the Helston estuary.