Glaciers are uncommon in the Northern Limestone Alps, and those on the Dachstein — the Hallstätter Gletscher (Hallstatt glacier), the Großer Gosaugletscher (great Gosau glacier) and the Schladminger Gletscher (Schladming glacier) — are the largest, as well as being the northernmost and the easternmost in the whole of the Alps. Several smaller ice-fields also exist, such as the Kleine Gosaugletscher (lesser Gosau glacier) and the Schneelochgletscher (snow-hole glacier). The glaciers are retreating rapidly, and may disappear entirely within 80 years. The Hallstatt glacier withdrew by 20 m in the year 2003 alone. By 2018, it is estimated that the glacier has retreated more than 1 km since 1908.