The Rifflsee (rarely Riffelsee) is the largest lake in the Oetztal Alps.
The lake is located in the Kaunergrat west above the Pitz Valley and is a typical moraine reservoir.
The lake fills a vast basin, the glacier murky water looks greenish.
It is framed in the north and west by rugged peaks of the Kaunergrat, especially striking are Seekogel and Rostizkogel.
In sunny and warm weather, a considerable amount is supplied to meltwater from Seekarles-, hole and Rifflferner.
The Pitztal is an alpine valley located in Tyrol, Austria. The Pitztal is a southern side valley of the Upper Inntal,
and runs between the valleys Ötztal (to the east) and Kaunertal (to the west).
The Pitze river runs the length of the valley and flows into the Rifflsee lake (2232 m) west of the upper coarse; its average rate of flow is 2.7 m3/s.
The uppermost section of the river produces the Gries waterfall.