TOUGH ENOUGH TO walk through fire, get electric shocks, jump into ice, and swim in mud?

If you are, you’re as brave as these hardy souls who tackled the above – which included the sinisterly-named Arctic Enema obstacle – during the 2012 Tough Mudder Extreme Endurance Challenge, which was held in the grounds of Drumlanrig Castle and Country Estate in Dumfriesshire this weekend.

The 12-mile obstacle course is designed by the UK’s Special Forces to test fitness, stamina and mental strength, and the events take place around the world in different locations.

(ToughMudder/Youtube)

This year there were over 5,000 participants taking part throughout the weekend at the Dumfriesshire event, where they braved 100,000 gallons of mud, waist-high swamps, underground tunnels, and electric shocks as they conquered the 22 obstacles.

We’re not sure what part scares us the most – still, it looks like most of the participants enjoyed their time as Tough Mudders, if these pics are anything to go by.