In particular, those regions of the High Bavarian Forest were covered by snow and ice fields during the Ice Age that also left their traces. Here, on the vast plateaux there were rather extensive firn fields rather than long glacial snouts. The thickness of the glacier ice at 1,050 m was about 125 metres. Where the glaciers made their way into the valley, one can still find glacial landforms such as cirques, caroids (Karoide) and cirque lakes (Großer Arbersee, Kleiner Arbersee, Rachelsee) as well as moraine banks.