The lake was carved into the landscape by a glacier during the last Ice Age.
It is the highest-situated cirque lake in the Black Forest region.
The water depth reaches up to 32 meters at its deepest point.
As a core zone of the Feldberg Nature Reserve, the lake is under strict environmental protection status.
The Feldsee is an oligotrophic lake, meaning it is low in nutrients and high in oxygen.
Feldsee is a circular, glacial cirque lake situated at an elevation of 1,109 meters in the Southern Black Forest, Germany. It is fed by the Seebach stream and bordered by the steep, 300-meter-high forested slopes of the Feldberg mountain. The lake is a protected nature reserve, prohibiting swimming and watercraft to preserve its sensitive ecosystem. A well-marked network of hiking and mountain biking trails surrounds the basin, connecting it to the summit of the Feldberg. The water remains cool year-round due to the lake's depth and altitude. It functions as a habitat for the rare quillwort plant, Isoetes lacustris, which is an indicator of high water quality.
The shoreline viewpoint near the wooden bench on the northern bank.
Wear sturdy hiking boots as the trails leading down to the lake are steep and can be muddy.
Bring a backpack to carry out all personal trash, as there are no bins near the shoreline.
Combine the visit with a hike to the nearby Feldberg summit for a full-day excursion.
Do not attempt to swim in the lake, as it is a protected nature reserve and heavy fines are enforced.
Accessible year-round, though trails may be impassable or hazardous during heavy winter snow or ice.
Stay strictly on designated paths to protect the vegetation; swimming and camping are prohibited.
