In pictures: Dartmoor Ten Tors Challenge takes offPublished10 May 2014Shareclose panelShare pageCopy linkAbout sharingImage caption, About 2,400 young people started the Ten Tors Challenge across Dartmoor in Devon.Image caption, The Ten Tors entrants, aged between 14 and 19, will trek for 35, 45 or 55 miles and camp on the moor on Saturday night.Image caption, The Ten Tors Challenge tests schoolchildren on navigational and team-working skills.Image caption, Most of the entrants are from Bristol, Cornwall, Devon, Dorset, Gloucestershire, Somerset and Wiltshire.Image caption, Trekkers, who have been training for months, carry all their food, water, bedding, tents and other essentials.Image caption, Several hundred more youngsters with disabilities or special needs are taking part in the sister-event, the Jubilee Challenge.More on this storyFifty Dartmoor trekkers drop outPublished10 May 2014Related internet linksDartmoor National Park AuthorityTen TorsBritish ArmyThe BBC is not responsible for the content of external sites.