Prior to the Red Year, Dark Elves told tales of how St. Jiub drove the Cliff Racers from Vvardenfell. One thing is certain, these flying creatures find the awkward topography and rocky outcroppings of the southern Felsaad Coast enticing. In particular the mountainous hill upon which sits the Sun Stone. Here a number of Cliff Racers have roosted making the pilgrimage to this spiritual stone a hazardous one.
Thanks go to Phitt for creating the Cliff Racer modder's resource.