Mount Ossa (Greek: Όσσα), alternative Kissavos (Greek: Κίσσαβος), is a mountain in the Larissa regional unit, in Thessaly, Greece. It is located between Pelion to the south and Olympus to the north, separated from the latter by the Vale of Tempe, with its height at 1,978 metres (6,490 ft).
In Greek mythology, the Aloadaes are said to have attempted to pile Mount Pelion on top of it, in their attempt to scale Olympus.
This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). Encyclopædia Britannica (11th ed.). Cambridge University Press.