These are the mountains that the Riders are trained on. It is a place known to only the riders. There are many interesting creatures on the mountains whose name means "Mountains of Dragon Riders." They aren't very tall, about the same height as the mountains in the Spine, where Eragon grew up. It has not had much known history.
The one event that stands out in the history of these mountains. A Ra'zac army invaded our land and attacked our school. We retaliated by fighting viciously. We were outnumbered by many, but dragons are worth three Lethrblaka, and we triumphed in the end. Riders always do.