TEN Tors team managers gathered at Okehampton Camp on Saturday, to learn and remind themselves of the purposes of the Ten Tors expedition, its safe conduct and its care for Dartmoor's precious environment. Some 2,400 youngsters aged between 14 and 19 will be selected to accept the challenge of hiking unaided 35, 45 or 55 miles in 21 hours over the weekend of 12-13 May. In parallel, less able teenagers will take part in the Jubilee Challenge supported by Exeter University Officers Training Corps. Brigadier Jolyon Jackson, Commander 43 (Wessex) Brigade, whose troops provide support for the training and expedition, said: 'In this 47th year of the expedition, which does so much for the South West's youth, I will be emphasising the need for team work and determination to overcome the demanding challenge as well as encouraging the team managers and participants to experience and respect Dartmoor.' During the weekend, which all team managers must attend at least every five years, they walked with Dartmoor's experts — the National Park Authority Rangers and guided walk leaders and the Dartmoor Rescue Group. Through them they learned more of Dartmoor's landscape, wildlife and cultural heritage, which will be passed on to the participants through club programmes, school lessons and practice walks. Orlando Rutter, education manager of Dartmoor National Park Authority added: 'One of Dartmoor's purposes is to promote opportunities for understanding and enjoyment, but we also need to care for Dartmoor's wild landscape, cultural heritage and moorland environment. 'Through the Ten Tors managers, we are encouraging young persons to appreciate, understand and enjoy the special qualities of our National Park.'