The main chain has more glaciers and eternal snow than the independent or external ranges. The longest of these were both a century ago, the Mer de Glace at Chamonix (now ) and the Gorner Glacier at Zermatt (now ). In the Eastern Alps the longest glacier was the Pasterze Glacier ( in 1911), which is not near the true main watershed, though it clings to the slope of the Grossglockner (3,798 m) in the Hohe Tauern range east of the Dreiherrenspitze. But two other long glaciers in the Eastern Alps (the Hintereis, and the Gepatsch) are both in the Ötztal Alps, and so are close to the true main watershed.