Please don't park on Dartmoor's grass verges or the fragile moorland itself, as you can cause damage which will take years to recover. The peat soil which covers much of Dartmoor holds water like a sponge, especially after a long wet spell, making it particularly vulnerable to vehicle damage. There are plenty of designated parking spaces on Dartmoor, especially close to popular walking spots, and you'll be doing the moor a favour by using them. You'll often find Dartmoor ponies close to car parking areas. They are a beautiful sight, but don't be tempted to feed them (it only encourages them to spend more time close to roads, where they are at risk from passing vehicles).