Lake Gossenkölle is a 1.6-hectare high-altitude lake at 2,416 meters above sea level, situated above the Kühtai Saddle in the Stubai Alps. Data has been collected at this lake since 1975, after the original research station at Lake Finstertal was relocated due to a reservoir project. From 1975 to 2014, the lake was designated a UNESCO Biosphere Reserve. Located directly on the lake is a research station, which underwent extensive renovations in 1994. It is equipped with electricity and water and includes laboratory workstations, sleeping accommodations for six people, a kitchen, sanitary facilities, a sauna, and a storage room. A weather station with online data transmission is mounted on the roof. A measuring buoy in the lake monitors parameters such as temperature, pH value, oxygen content, and conductivity during the ice-free months. Additional equipment includes a boat and diving gear for two people. Current scientific investigations at Lake Gossenkölle are focusing on various groups of aquatic organisms, such as bacteria, flagellates, and copepods. Atmospheric deposition and its influence on the lake are also being studied. Recent research has investigated the presence of viruses in the lake. Different groups of snow algae are being studied on the snow-covered areas surrounding the lake. In addition to specific research, the research station also conducts monitoring programs. It is an LTER (Long-Term Ecosystem Research) site of the LTSER platform Tyrolean Alps and LTER Austria, and since 2015 a site of GLEON (Global Lake Ecological Observatory Network). It also serves as a training site for school and university students.