About 90 kilometers east of Akureyri is Mývatn, Iceland’s fourth largest lake. It was most likely formed in a catastrophic volcanic eruption some 2300 years ago, and the area is still very volcanically active, Krafla volcano is not so far and its last eruption taking place in 1984.The lake and its surrounding wetlands have an exceptionally rich fauna of waterbirds, especially ducks. The effluent river Laxá is known for its rich fishing for brown trout and Atlantic salamon.The name Mývatn is often used not only for the lake but the whole surrounding inhabited area. The famous river Laxá, Lake Mývatn and the surrounding wetlands are protected as a nature reserve (which occupies 440,000 ha). And for the runner´s : a big marathon around the lake takes place in summer.