According to tradition, the Blessed Mother consecrated Mount Athos to the monks living there. Since this is our Lady's mount, all other females are not allowed on the mountain.
Some feminists recently tried to invade the mountain and invade the privacy of the monks in order to condemn the alleged injustice of a "men's only" mountain. Completely ridiculous and insensitive.
Read it all here from the Cafeteria is Closed.