Tomaros or Olytsikas is a mountain range in Ioannina prefecture, Epirus, Greece. Its highest peak is Pentolakos (1974m above sea level).
The Tomaros mountains are situated SW of the city of Ioannina. The ancient oracle of Dodoni is situated on its north side.
The Acheron and Louros rivers both stem from the Tomaros mountains.