The lake is classified as a protected natural monument due to its pristine water quality and ecological significance.
Subterranean springs supply the lake, ensuring constant water replenishment and low water temperatures.
The maximum depth of the lake reaches approximately 36 meters.
The lake basin was sculpted by the movement of the Inn Glacier during the Würm glaciation period.
The water is categorized as drinking-water quality, a rarity for public swimming lakes in the region.
Hintersteiner See is a mountain lake situated at an elevation of 883 meters within the Kaisergebirge nature reserve. It is a glacial lake formed during the last ice age, fed by numerous subterranean springs that maintain high water clarity. The lake is private property, yet access for swimming and recreation is permitted at designated areas. The water temperature typically reaches up to 22 degrees Celsius during peak summer months. A circuit trail encircles the lake, spanning approximately 4.5 kilometers with minimal elevation gain. Swimming facilities include a lido on the western shore and multiple access points along the southern bank. The surrounding landscape consists of dense forests and the limestone peaks of the Wilder Kaiser range.
The northern shore looking south, providing a reflection of the Wilder Kaiser peaks in the water.
Use the designated public parking areas rather than attempting to park near the lake entrance, as local roads have strict restrictions.
Bring sturdy walking shoes if planning to hike the full perimeter trail, as some sections feature exposed roots and uneven terrain.
Carry out all waste to preserve the sensitive ecological balance of the nature reserve.
Attempting to drive private vehicles directly to the shoreline during peak season, as the access road is often closed or heavily regulated.
The lido and public parking access are primarily managed during the summer season; winter access is limited due to snow conditions.
Swimming is strictly restricted to designated areas to protect the shoreline vegetation and water quality; no dogs allowed in the water.
