The outwash plain is located between the rivers of Kúðafljót in the east and Múlakvísl in the west. Both rivers carry water from the Mýrdalsjökull glacier to the sea.
Mýrdalssandur has a 35 km (22 mi)-long coast line, including Kötlutangi, the southernmost point of the island of Iceland.
The Ring Road crosses this flat surface on 25 km (16 mi).
