Dartmoor can be a deceptively dangerous place. The weather is very changeable and you could get surrounded in mist very quickly, in the summer it can get extremely hot and you may not be able to find shade for several miles . If you're planning on going out for a walk of any length on Dartmoor, it is best to know how to read a map and use a compass, this is vital if you plan to go off the beaten track, it can be almost impossible to navigate some areas and you will end up walking in circles. If you must use a GPS, take plenty of spare batteries.
As with any outdoor activity, it is always best to let somebody know where you're going and how long you expect to be.
