The race route – which crosses a bog before heading up and down an extremely steep and punishing scree-slope – is held each year on the Isle of Skye. The original record for the run was set more than 100 years ago when a Ghurka named Thapa, one of a group of climbers visiting Skye, ran barefoot to the top of Glamaig and back. His time was unbeaten from 1899 until the 1980s.