Olgassys
Ὄλγασσυς
Olgassys (Ὄλγασσυς), a lofty and inaccessible mountain on the frontiers of Paphlagonia and Galatia, extending from the Halys in a south-western direction towards the Sangarius, and containing the sources of the Parthenius. The surrounding country was filled with temples erected by the Paphlagonians. (Strab. xii. p.562.) The mountain mentioned by Ptolemy (5.4.4) under the name of Ligas, Gigas, or Oligas, is probably the same as the Olgassys of Strabo. It still bears its ancient name in the corrupt form of Ulgaz, and modern travellers state that; some parts of the mountain are covered with snow nearly all the year.
From William Smith (ed.), Dictionary of Greek and Roman Geography. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.