Pupils from Colyton Grammar School in Devon describe taking part in this year's Ten Tors event on Dartmoor and the weather challenges posed by this annual event.
The Ten Tors event is held every year on Dartmoor with teams of young people walking either 35, 45 or 55 miles over two days. They carry everything needed for shelter, food, drink and safety on their backs. Like many remote environments, Dartmoor's weather can change quickly so weather forecasts like the Met Office's Mountain Weather forecast and National Parks forecast are very important.
Here, Colyton Grammar School students James Nicholson and Jonty Eaton-Hart describe just what the two days involved.
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25-30 May - Check the weather forecast for the Urdd Eisteddfod in Caerphilly, Wales.
28-31 May - Check the weather forecast before heading to The Royal County Down Golf Club in Newcastle for the Irish Open Golf.
30 May - 12 June - Check the forecast for the Isle of Man TT as motorcyclists compete in this prestigious road race.
31 May - Will you be cheering on the Edinburgh marathon competitors? Check the weather forecast.
Find out more about weather phenomena including clouds, rain and snow.Learn more
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