Mount Cyllene is traditionally associated with the birth of Hermes in Greek mythology.
Cyllene is a mountain in Arcadia in the central Peloponnese. In the Homeric Hymn to Hermes, Maia gives birth to Hermes in a cave there. The mountain therefore became particularly associated with the god, who is sometimes called Cyllenian Hermes.
The location fits Hermes’s early identity as a god connected with movement, boundaries, travelers, and communication. Arcadia also has strong pastoral associations, which matter in the story of Hermes’s theft of Apollo’s cattle.
Mount Olympus is the home of many Olympian gods, but it is not the traditional birthplace of Hermes. Mount Ida is associated with other important Greek myths, including the upbringing of Zeus in some traditions, while Parnassus is strongly linked with Apollo and the Muses.