The Galarpos Mountains are part of a mountain range in Western Kandarin and Eastern Tirannwn, which separates Tirannwn from the rest of the mainland. For a long time, the mountains were largely thought to be impassable. The only routes available past the mountains are either through the Underground Pass or through the Arandar mountain pass.
- Galar pos is Welsh (as is the majority of Elven related things) for "mourning puzzle", which may refer to the Underground Pass or the Temple of Light.
- Gal arpos also translates to "All Rock" or "All Stone" in Old Gnomish.
- In RuneScape Classic they are referred to as the "Impassable Mountain Terrain".