The Three Peaks Yacht Race is a tough endurance event in which teams of four or five, based on yachts, set sail from Barmouth and sequentially despatch runners to climb to the summits of the highest mountains in Wales, England and Scotland.
This is the equivalent of three marathons in three or four days. All participants have to be over 18 years old. Rowing is allowed. Engines are not.
The first leg is a sail of 62 sea miles from Barmouth to Caernarfon. After being put ashore, the runners set off to the summit of Snowdon via the Mountain Ranger Path and return via Llanberis, a distance of 24 miles.
The second leg is Caernarfon to Whitehaven. Approx 100 sea miles. The distance to Scafell Pike and back is around 40 miles, so bicycles are allowed for the first part.
The last sail, from Whitehaven to Fort William, is around 227 sea miles – rounding the Mull of Kintyre and north to the Sound of Jura through some difficult tidal streams and overfalls.
The runners then set off to the summit of Ben Nevis. Their race is finished when they return and cross the finish line.