In the middle of the 19th century it clearly reached into the valley of Grindelwald as far as Mettenberg at an altitude of , an eastern quarter of Grindelwald, near the conjunction of the Schwarze and Weisse Lütschine In 1900 it still reached as far as Rote Fluh () and filled the entire valley of its current end, the glacier lake, with a thickness of about up to an altitude of , just below the current hiking path around the Bänisegg. Around 2000 it still reached into the gorge between the Hörnli (Eiger) and Mättenberg.