Met Office forecasters are predicting a windy and cool weekend for the Ten Tors Challenge.
Dartmoor National Park is one of the last wildernesses in England and this weekend hundreds of teenagers will converge on the moor to take up the Ten Tors Challenge to face hikes of 35, 45 or 55 miles.
Antony Astbury, Deputy Chief Forecaster at the Met Office said: "It's an unsettled picture for Dartmoor this weekend. For the Ten Tors participants the main feature will be the strong winds which will make it feel very cold. During the day on Sunday visibility will be reduced as cloud lowers over the hills"
Brigadier Piers Hankinson, Director of Ten Tors and Commander of 43 (Wessex) Brigade said: 'Without exception, all organisations involved with Youth Development continue to be supportive of the event because Ten Tors literally changes lives for the better; helping to shape the values, attitudes and fitness of thousands of young people for their benefit and the benefit of society. Good luck to the participants and I look forward to meeting you in Okehampton Camp or on Dartmoor.'
The latest forecast for Dartmoor can be found on the Met Office Events.