Nóttsmýrr is a large, heavily wooded swamp, or mýrr, northeast of Østby. It is locally known as Nóttsmýrr because Nótt the Swamp Hag lives there. During the Hearthforge Scouting Mission, the party passed through Nótt's territory and visited her at her home in the swamp. They made an uneasy alliance with her before continuing toward Hearthforge.