This study was carried out on fiah Lake located 33km of south of Aflkale district in Erzurum. fiah Lake with 2435m altitude and about 8 - 10 are surface area has appearance like a Limnokrena source or a glacial lake. lt was observed that the 90% of the water mass in the lake freezing between the month of November and April and water temperature reaching 18ºC maximum in summer months.