Storsjön is Sweden's fifth largest lake and lies 292 metres above sea level. Along the lake's deep bays there are signs of iron age settlements. Storsjön has an area of 456 square km and offers extensive views towards the mountains. The lake is fed by the river Indalsälven and the creeks Ytterån, Hovermoån and Billstaån. The outlet is through the river Indalsälven. In 1938, Storsjön was regulated by the building of a dam This map shows all of lake Storsjön and the known observations until 1995. Click on the white spots on the map to read the testemonies of the witnesses.  Storsjöodjuret exhibits a noticeable preference for the bays and sounds of lake Storsjön. Large open spaces of water seem to frighten the monster and very few sightings have been recorded in the open waters north-west of the island Frösön. Until the whole of the lake is placed under observation no definite conclusions can be made. In first hand Storsjöodjuret has appeared near the more densely populated areas of the lake. Storsjöodjuret, as is clear from the graph, has appeared most often in the warmest months. The compilation above is based on information where the time of sighting has been given with some accuracy. There are even several sightings during the autumn and in December. Annual distribution of sightings of Storsjöodjuret from available sources to December 1997 As you can see from this chart there were few observations until the nineteenth century. From 1820 people see Storsjöodjuret more often. At the end of the century it starts to appear more regularly each summer . Since the monster first was observed, in the middle of the 17th century, and on to today, 175 observations are documented. (NOTE. During the sixties no observations were registered.)