Mattsee 503m, also called Niedertrumer See, has a water area of 3,6 km² and is located on the border of Salzburg to Upper Austria. The catchment area around the lake is about 15 km². Communities are placed of the lake Mattsee is the village Mattsee in Salzburg and the village Lochen in the district Braunau in Upper Austria. View over the lake to the east. Presented by https://www.segelschule-mattsee.at.