River Eldvatn on Brunasandur originates in Eldvatnsbotnar eystri in Brunahraun. It flows in several “kvíslar” below the lava, then emerges and flows into Hverfisfljót. In the river are mainly sea-run char, but also sea trout in the spring and autumn. Salmon are also occasionally caught. The main char area is above the farm Teygingarlækur, and below it a few salmon are often caught. Sea trout fishing is mainly at the confluence of the Hverfisfljót river, where large char up to 8-9 pounds are also caught.