Alex and Phil Hammick, who grew up in Devon and regularly return to the South Molton area, are taking part in the 254 kilometre (156 mile) Marathon Des Sables for charity. The race starts tomorrow (Sunday) will see them tackle some of the most punishing terrain on the planet, with temperatures capable of soaring above 50 degrees Celsius. The Army reservists are aiming to raise £10,000 and awareness for the charity Walkoncemore, which seeks a cure for spinal cord injuries. Their jaunt across the Moroccan Sahara is the equivalent to six regular marathons and they will cross everything from sand dunes to salt flats and mountains to rock. They will complete the course with their entire kit on their backs, containing all food, cooking equipment, sleeping bags, clothes, venom pumps, flares, and other essential survival kit. The brothers both work in London in the insurance industry but still have many friends and family in North Devon and return regularly. They have both been training at the University of Roehampton in London as part of a research program which included exercising in a heat chamber to simulate the extreme conditions they will face. They say they have covered literally thousands of kilometres in training to prepare for the event. Alex is 29 and Phil is 27. Alex said: We are looking forward to the challenge and how we will deal with it. Were very active, we love walking and running around Exmoor and North Devon during the recent period when its been icy and snowing has been particularly challenging. On their JustGiving page for online donations, they said: All of this combined though still doesnt compare to how tough daily life is for millions of people around the world after falling victim to a spinal cord injury. With each unforgiving mile of the course, we are aiming to raise as much money and awareness as possible towards a cure for this debilitating condition. If you would like to support the brothers and the charity by making a donation, go to www.justgiving.com\/fundraising\/the-hammicks .