Organisers of the Original Mountain Marathon have revealed the venue for this year’s event.
The two-day test of runners’ stamina, endurance and navigation will take place in the Tweedsmuir Hills in the Scottish Borders.
Entrants will also need mountain skills to make their way round the course to checkpoints spread over 400 sq km of Scottish wilderness.
Up to 2,000 competitors, in teams of two, are expected at the event, which takes place on 24 and 25 October.
Organisers of the marathon, which was first held in 1968 when it was known as the Karrimor International Mountain Marathon, said: “Held in some of most remote locations and at a time of year when conditions can be extremely challenging, the OMM is meant to be hard, it is hard.
“An overnight wild camp at the end of day one adds a unique element to the mountain marathon format, with teams carrying everything they need including tent, kit and emergency equipment. Their success depends on being fast and light and ‘what to pack’ becomes a serious consideration.”
Different course difficulties are available for entrants to choose.
Events director Stuart Hamilton said: “This year’s location provides an exciting mix of challenging terrain, interesting route options and a spectacular overnight camp.
“The OMM hasn’t visited these mountains before and we look forward to seeing which routes the competitors choose.”
More details, including how to enter, are on the OMM website.