The Kvíslavötn lakes are a good walk on the west side of Arnarvatnsvegur, in a straight direction from Hólmavatn which lies by the road. Here are the main sources of Núpsá, which is a part of the popular fishing area of River Miðfjarðará. There is one main lake, and it is at 410 m above sea level and 0.80 km² in area. In Kvíslavötn there are good fish, both brown trout and Arctic char and the average size is about 2 pounds.