Lag Tuleritg

Lag Prau Tuleritg
Location	Flims, Grisons
Coordinates	46°49′16″N 9°16′59″E / 46.821°N 9.283°ECoordinates: 46°49′16″N 9°16′59″E / 46.821°N 9.283°E
Type	part time lake
Primary inflows	nameless
Primary outflows	none
Basin countries	Switzerland
Max. length	180 yds
Max. width	80 yds
Max. depth	2 yds
Residence time	one summer
Frozen	empty during winter!
Islands	none

Lag Tuleritg is a lake at Flims in the canton of Grisons, Switzerland.

As close as 500 yards to the Caumasee, well known for swimming, is another dell, home of Lag Tuleritg which is just 18 Metres higher. This lake falls completely dry in autumn and remains empty until being filled by a small river of just about half a mile in length (falling some 100 metres in level) that will start flowing around May depending on temperatures and snow melt rate in the mountains. Its origin is another lake, Lag Prau Pulté, which is fed by underground water only in spring, disapperaring in autumn and staying dry all winter. During a cold period in spring, water that entered the dell of this lake may disappear again as snow melt decreases and all water remains in the underground flow. Due to its origin the water of both lakes is grey all summer until the level starts to go down in autumn. In Lag Prau Pulte one can see another special effect caused by air being forced out of the underground, causing the lake not only to remain grey but offernig frequent bubbles on the surface.

Because its proximity it is very likely that the water from Lag Tuleritg continues underground to Caumasee, although no experiments using colour was ever to prove this.