Thousands brave mud, fire and electric shocks in last ever Tough Guy

For the last 30 years, adrenaline junkies have been braving mud, fire and electric shocks in what has been described as the world's toughest one-day race. This year's Tough Guy Challenge – an epic obstacle course run along a muddy 15km course on a farm near Wolverhampton – was the last one ever. Competitors faced 250 obstacles, including a 40ft vertical wall climb, an underwater tunnel and a series of concrete pipes fixed with hanging electric wires.

Billy Wilson, a former soldier who created the obstacle course in 1987 and who goes by the name of Mr Mouse, has decided to put a stop to the annual challenge. Instead, he wants to turn it over to a non-profit charity to run. The money raised by the competitors goes towards the Horse Sanctuary charity, which aims to help unwanted, elderly or injured horses and donkeys.