Thousands of people are expected to turn out for the second day of the Tough Mudder in Dumfries and Galloway.
The event, at Drumlanrig Castle, is billed as the toughest endurance challenge is the world. Participants jump into pits of nettles, walk through fire, and be shocked by electricity on the twelve-mile course.
It's the first time the Tough Mudder has come to Scotland.
More top news
A look ahead at the forecast for the Border region.
Immigration, extremism, Europe and tax cuts: The key promises unveiled in the first Tory-only Queen's Speech in almost two decades.
Fiona Marley Paterson's latest report into Cumbria Tourism's plan to make the Lake District the Adventure Capital of the UK by 2018.