The event highlights Lake Klopein’s reputation as one of the warmest swimming lakes in Europe and its suitability for open water competitions.Lake Klopein, situated near Völkermarkt in the municipality of St. Kanzian, is known for its still waters and warm temperatures, making it a popular destination for sport swimmers. During the Alpen-Adria-Swim-Cup, the lake is used as a venue for endurance swimming events, with participants swimming courses that encircle the lake.