Lefka Ori ("White Mountains") is a mountain range located in Western Crete, in the Chania prefecture. The White Mountains or Lefka Ori occupy a good part of the centre of West Crete and are the main feature of the region. They consist mainly of limestone, from light grey to bluish or black color. The "White Mountains" have got their name from the perpetual white or off white color of their peaks as the off white of limestone during the summer and fall interchanges with the snow that covers the peaks until late in spring.

The Lefka Ori has a rich history as a hiding place for rebels during Cretan uprisings against the Venetian and Ottoman rulers, as well as during German Occupation (1941–1945).

The Lefka Ori are home to both of Greece's caves with depths greater than one kilometer, Gourgouthakas and the Cave of the Lion.