The primordial mountain gods of Greek myth were called the Ourea. They were the personifications of the mountains themselves, rather than a family of individually famous Olympian-style gods.
In Hesiod’s Theogony, Gaia produced the Ourea parthenogenetically, alongside Uranus, the sky, and Pontus, the sea. The mountains were described as delightful dwellings for divine nymphs, linking the Ourea to the rugged landscapes where many local nature spirits lived.
The name Ourea is the plural of the Greek word ouros, meaning “mountain” or “hill.” Hesiod does not provide a complete roster of named Ourea in the way later mythology names many Olympians. They function primarily as a collective primordial generation emerging during the ordering of the cosmos.
A common mix-up is Oreads, who were mountain nymphs associated with particular peaks and wild places. Gaia is Earth herself, while Uranus is the sky; neither term names the primordial mountain deities.