Pony mare and her newborn foal.Most Dartmoor foals are born between May and August, and are just 50 to 60 cm tall at birth. Adult Dartmoor ponies reach a maximum height of 127 cm. Even today, most Dartmoor ponies still roam free in south-west England. They form small herds led by a stallion. The information provided here is as complete and accurate as possible; however, product names, colours and/or materials are subject to change without notice.