The Glärnischfirn (also known as the Glärnischgletscher, the Glarnisch Glacier) is about one mile long and about one-half mile wide at between 1.5 and 2.0 miles above sea level. The surrounding peaks are generally accessible to hikers and climbers only by traversing the length of the glacier itself. From the Vrenelisgärtli peak, the Lake Klontal may be seen directly, more than one mile below.