Tomasee

See also: Sources of the Rhine

Lake Toma (Tomasee)
Lai da Tuma
Lake Toma (Tomasee) Location within Canton of Graubünden Lake Toma (Tomasee) Location within Canton of Uri Lake Toma (Tomasee) Location within Switzerland Lake Toma (Tomasee) Location within Alps
Interactive map of Lake Toma (Tomasee)
Location	Grisons
Coordinates	46°37′57″N 8°40′20″E
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)

Lake Toma (German: Tomasee, Romansh: Lai da Tuma or Lag da Toma) is a lake at the northern face of Piz Badus, above the village of Tschamut in the canton of Grisons (Graubünden), Switzerland. Its surface area is 2.5 ha (6.2 acres).

It is the source of the Anterior Rhine and is deemed to be the official source of the Rhine (the source of the Posterior Rhine is above Hinterrhein, Switzerland, at 46.499°N 9.065°E / 46.499; 9.065 (Source of Hinterrhein)).

It is possible to reach the lake on a path from Oberalp Pass, suitable for most walkers although still a mountain trail.

Sign for the source of the Rhine (German: Rheinquelle) near Lake Toma

See also

• List of lakes of Switzerland
• List of mountain lakes of Switzerland

External links

• Media related to Tomasee at Wikimedia Commons