Tomasee

Lake Toma is a lake at the northern face of Piz Badus, above the village of Tschamut in the canton of Grisons, Switzerland. Its surface area is 2.5 ha. It is the source of the Anterior Rhine and is deemed to be the official source of the Rhine.
  • Location: Grisons
  • Primary inflows: Rein da Tuma
  • Primary outflows: Rein da Tuma
  • Basin countries: Switzerland
  • Surface area: 2.5 ha (6.2 acres)
  • Surface elevation: 2,345 m (7,694 ft)
Data from: en.wikipedia.org