There are planty of clean waters in the area ofthe Kamnik-Savinja Alps.You can therefore find the KSA Water trails fold on the Kamniško - Savinjske Alpe website. The 160 km longroute encircles the Alps in 11 stages. Two of them include Jezersko.You're welcome to take a look! https://www.ksalps.com/en/vodne-poti/