In the French alps, all the glaciers there are retreating. On Mont Blanc, the highest peak in the Alps, the Argentière Glacier has receded since 1870. Other Mont Blanc glaciers have also been in retreat, including the Mer de Glace, which is the largest glacier in France at in length but retreated between 1994 and 2008. The glacier has retreated since the end of the Little Ice Age. The Argentière and Mer de Glace glaciers are expected to disappear completely by end of the 21st century if current climate trends persist. The Bossons Glacier once extended from the summit of Mont Blanc at to an elevation of in 1900. By 2008 Bossons Glacier had retreated to a point that was above sea level.