The Big Ben Nevis Triathlon

One of the toughest and most rugged triathlon courses in the UK awaits you at this No Fuss Events challenge. For the very fit and very brave, there's a 1.9km swim in a freezing sea loch, a 90km bike ride around Glen Nevis, and a 21km fell run up and down the UK's highest mountain. For the slightly less fit but nonetheless still a little mad, there's a half-distance race running alongside the main event.

• Website: www.nofussevents.co.uk