Pingos are intrapermafrost ice-cored hills, ranging in height from 3 to 70 m (10 to 230 ft) and 30 to 1,000 m (98 to 3,281 ft) in diameter. They are typically conical in shape and grow and persist only in permafrost environments, such as the Arctic and subarctic. A pingo is a periglacial landform, which is defined as a non-glacial landform or process linked to colder climates. It is estimated that there are more than 11,000 pingos on Earth. The Tuktoyaktuk peninsula area has the greatest concentration of pingos in the world with a total of 1,350 pingos. There are currently remarkably limited data on pingos.
