Lake Kelduvíkurvatn is registered as owned by Þangskáli, but as with many other lakes in this area, it is the farmers in Hraun who sell fishing licenses. The lake is 0.3 km² in area and is a short distance from the main road. The lake contains char of 1-2 pounds and also brown trout, which are quite big. There have been stories of trout from 3-6 pounds. The lake is divided in half from the creek in the middle. The northern part is in the land of Hraun. The price of fishing permits is relatively high as only half the lake is sold at a time and anglers need to pay double if they want to fish the whole lake. It has proven to be good not to wade far out but to fish close to the bank. There is a gravel edge, and the fish seem to prefer to feeding here rather than further out in the lake.