The Hira Mountains (比良山地, Hira-sanchi) are a mountain range to the west of Lake Biwa on the border of Shiga Prefecture and Kyoto Prefecture, Japan.

It is narrowest in the southern part of the range, running 3 kilometres (1.9 mi) east to west, and broadest at the northern part of the range, running 10 kilometres (6.2 mi) km east to west.

[1] The spring snow of the Hira Mountains is one of the Eight Views of Ōmi.

[1] A strong local wind Hira-oroshi (比良颪) often blows from Hira Mountains to Lake Biwa especially in the late days of the March.

In every 26 March, Tendai priests hold a memorial service for casualties of shipwreck accidents.