THOUSANDS of adventurers found an unusual way to cool off this weekend – by racing through 100,000 gallons of mud.

The annual Tough Mudder event at Drumlanrig Castle and Country Estate in Thornhill, Dumfriesshire, saw participants run through ice cold water and navigate around 20 obstacles in a course designed by British special forces.

Described by organisers as “the toughest event on the planet’’, the extreme endurance challenge was the brainchild of Will Dean and Guy Livingstone and regularly takes place in the UK, US, Australia and Canada to test fitness, stamina, mental strength and camaraderie.

While Tough Mudder participants climbed 12ft walls and crossed muddy trenches, other runners found a more traditional way to unwind with 5k and 10k charity races held in Glasgow and Dundee over the weekend.

Held on Father’s Day, Roy Hann was cheered across the finish line of the Race for Life Dundee by his 13 children. He said: “I can think of no better way to celebrate Father’s Day. So often in my job as a nurse practitioner I try to help patients who have cancer.”