This article examines the relationship between landforms and yearly snow distribution and permanence. A study site was chosen near the source of the Manzanares River in the watersheds of two mountain streams, Condesa and Valdemartin, that converge at the lowest spot height (1,795 m, 40º 46' 32'' N and 3º 57' 15'' W) on Cabeza de Hierro Menor Peak (2,373 m, 40º 47' 56'' N and 3º 56' 10'' W). The mapping of geomorphologic units and weekly photographing of snow distribution from 1996 to 2004 provided data to map snow covered areas.