Competitors took to the hills and dales of the Colne Valley on Sunday for the ultimate endurance test.
Runners converged on Marsden from across Britain and Europe to take part in the second annual White Rose Ultra.
It’s a marathon – and more – as runners complete one 30-mile lap of the circular route or, if they are really crazy, two!
Ultra marathons are the latest running craze with competitors travelling hundreds of miles just to test themselves.
There are two races, 30-mile and 60-mile, and the starting gun was fired at 8am.
The 30-mile runners take just under five hours while the 60-mile race, not surprisingly, takes double that.
Last year’s 60-mile winner, Ray Lanigan, from Ireland, came home in around 10 hours and 15 minutes.
Race director Wane Law said there were 136 people running the shorter distance and 87 tackling the longer one.
Each runner must carry their own survival kit including full-cover waterproofs, an emergency phone and a first aid kit. There are five food stations along the route.
Wane said: “It’s all about the challenge. It’s slightly brutal and while you have to be physically fit you also need to have the mental strength.
“For ultra runners it’s not really about their time, it’s about finishing. While it sounds tough, people do genuinely enjoy it.”