I think it's on the southern tip of the urals in Russia because those are mountains and there is a river that goes through the very southern edge of the Urals, and one subtext from one rare armor piece of Jagi's host says they were last seen marching SOUTH toward the caspian sea and since the Urals are almost directly north of the caspian sea it is most likely in the urals and the ocean hawthorne describes could be the caspian sea or she could have gone through the meditarenean to avoid a possible darkness in eastern europe in like poland or ukraine. Anyways that my 2 cents feel free to contest me I would love to be wrong!