 This is the largest glacial valley on the volcano, although it does not now have a glacier in it.There are seven named glaciers on Mount Shasta, with the four largest (Whitney, Bolam, Hotlum, and Wintun) radiating down from high on the main summit cone to below primarily on the north and east sides.The Whitney Glacier is the longest, and the Hotlum is the most voluminous glacier in the state of California.