A polar explorer is taking on a steam engine in a race across the moors to help raise awareness of obesity research.
Three Durham University graduates, who are in training for the World's first unaided and unsupported expedition from Greenland to the North Pole in 2012, joined up with the North Yorkshire Moors Railway (NYMR) for the special one day challenge on Saturday.
The expedition's leader Tim Williamson, 23, will be running cross-country through the North York Moors National Park against one of the NYMR's prestigious steam engines in a race spanning 16 miles from Pickering to Grosmont station.
His companions James Turner, 23, and Mohammad Rahgozar, 24, will be travelling on the train, monitoring Tim's progress, and enjoying a break from all their recent training.
They are fund-raising for The Obesity Related Behaviours Research Group based in the Wolfson Research Institute at Durham University.