Hverfisvötn is in Fljótshverfi and is in a catchment consisting of the rivers Laxá, Brúará and the lake junction by Djúpá. Laxá and Brúará are tributaries that originate at an altitude of about 500 – 600 m on Kálfafellsheiði. They merge just below the highway and flow in a single channel into the glacial river Djúpá. River Djúpá is not fished, except in the areas where the rain fed rivers meet the glacial water. Laxá and Brúará are both rather short – a total of about 4 km. They both run in gorges, which are easy to get into. Both rivers are fishable up to the waterfalls that are in the gorges. The best fishing spots in the area can be found by the fortification, both in the confluence by Djúpá and by the upper part of the defense. There are also many respectable places in the gorge in Brúará, but care should be taken there as the river is clear and the fish are easily spooked. The sea trout are big, often around 6 pounds and there are stories of fish, which should have been over 20 pounds.