There are several class 3 and class 4 routes available, however, Mount Mendel is best known for having two of the hardest ice climbs in the High Sierra on its North Face.[7] Two of the documented ice climbs are "Ice Nine" (IV, class 5+, AI4 or WI5) and "The Mendel Couloir", (III class 5.6, AI2 or WI3).[5] See the article Grade (climbing).