This group of dolmen are the largest and most varied. They are known as the Jungnim-ri dolmens and are centered in Maesan village, Gochang County, North Jeolla province.
The dolmens were built from east to west at the foot of a series of hills at an altitude of 15 to 50 meters/49 feet to 164 feet. Generally, the capstones of the dolmens are around 1 to 5.8 meters/3.2 to 19 feet in length and may weigh up to 225 tons. 442 dolmen have been documented and classified based on the size of the capstone.
This group is believed to have been constructed around the seventh century BCE.
The Gochang Dolmen Site is listed as Historic Site #391.