The Giger Waldsee is located in Calfeisental in the field of political community Ragaz in canton St. Gallen.
You can reach the reservoir about Bad Ragaz through the Tamina. Last major town is Vättis. From there, a mountain road, and on summer weekends performs a post bus route for about 400 meters higher dam. On the southern shore along a narrow road passes through some tunnels to the former Walser settlement of St. Martin. The road is closed in winter due to avalanche danger.
It is the largest lake which lies solely on the St. Gallen region.
The dam was completed in 1976 Gigerwald.
Southern shore with road, looking towards the dam in the east
Western end of the lake with the hamlet of St. Martin