Lake Fellsendavatn is in the highlands near Þórisvatn, only 19 km away from the Highland Center Hrauneyjar. In a normal season, the lake is about 1.7 km² and lies at about 530 meters above sea level. In severe droughts, the southern part of the lake disappears completely. This is the first lake that is reached when driving to the lakes Veiðivötn from Hrauneyjum. Brown trout juveniles that have managed to thrive well, were released into the lake. The fishing can be up and down, but the brown trout in the lake is quite big, or up to 6 – 7 pounds, and usually not less than about 2 pounds. The main fishing spots are by the coast to the north. The lake has also been quite popular in the winter when fishing through ice is allowed.