The Lonely Five Range, more commonly referred to as the Lonely Five, was a mountain range situated on the planet of Ryloth. Deep within a basaltic peak of the Lonely Five was the underground city called Kala'uun.
A fortress belonging to Clan Fenn was established within these mountains. During the time of the Clone Wars, Kh'aris Fenn resided in this fortress in exile.
In the era of the Galactic Civil War, the Jedi Knight Rachi Sitra named their Eta-2 Actis-class interceptor Lonely Five after this very mountain range.