Wikipedia
In Greek mythology, the Ourea ( "mountains," plural of ) were progeny of Gaia, members of the Greek primordial deities, who were the first-born elemental gods and goddesses, children of Gaia:
And she brought forth long hills, graceful haunts
of the goddess Nymphs who dwell amongst the glens of the hills.
The nine ourea, Aitna, Athos, Helikon, Kithairon, Nysos, Olympus, Oreios, Parnes, and Tmolus, like Uranus, and Pontus, were parthenogenetic offspring of Gaia alone. The Greeks rarely personified an individual mountain; an exception might be Tmolus, both a king and a mountain in Lydia. Each mountain was said to have its own local nymph, an oread.
Peak sanctuaries, a feature of Minoan civilization on Crete, are also identified in some archaic sites in mainland Greece. They are not thought to be dedicated to the mountain itself.