The Vellorian Mountains were a geographical feature of planet Barkon IV.
In 2370, a Federation probe crash-landed here. Lt. Cmdr. Data was sent to retrieve the probe, but was damaged by an explosion. He then traveled over 100 kilometers (or 200 seltons in local measurement) to the nearest inhabited village. There some people believed he was an iceman living in the Vellorian Mountains. (TNG: "Thine Own Self")