Obertrumer See

General data
- Name: Obertrumer See
- Water system: Danube
- Water type: Natural lake
- Progression: Mattsee -> Grabensee -> Moosach -> Mattig River -> Inn River -> Danube -> Black sea -> Mediterranean Sea -> Atlantic Ocean -> Planet Earth
- Climates: Continental, Mountain
- Continents: Europe
- Countries: Austria
Description
The Obertrumer See , occasionally also Obertrumersee , is the largest of the three Trumer Lakes in the Salzburg Flachgau region that belong to the Salzburg lake district . The Mattig (also known as Mattigbach as a tributary) flows from south to north through Lake Obertrum and then through Lake Grabensee , while Lake Mattig drains into Lake Obertrum via a canal.