Cöos Hill is the home to Rhea of the Cöos.
It is shown numerous times in Wizard and Glass and The Gunslinger Born. Initially when she receives Maerlyn's Grapefruit from Eldred Jonas as well as when Susan Delgado visits her to be checked for her virginity and purity. Rhea of Cöos was living years for a greart amount of years even before Roland Deschain, together with Cuthbert Allgood and Alain Johns, came to Mejis. She hardly ever have left the place, except for some times that she needed to go to the city. During Rhea's most critical period of addiction to The Pink Bend, Cöos Hill was her permanent place. She did not left the place during this time.