Lake Ánavatn lies on Jökuldalsheiði, a little south of Lake Sænautavatn and east of road nr. 907. Along that road you can also reach the lake from Brú in Jökuldal. The lake is 4.9 km², 24 m deep and 521 m above sea level. Its drainage is through Pollurinn and Þverárvatn, through Þverá to Jökulsár á Brú. There are a lot of good Arctic char in the lake that are caught both by rod and by net. There are many fish of 2–3-pounds and the biggest rod caught fish was 5 pounds. It is believed that the best time for angling is in the spring and early summer. The western shore of the lake is owned by the municipality, while the eastern shore is divided between Veturhúsa and Eiríksstaðir in Jökuldal.