The Betrush Mountains are located in Klatch. They can be reached by taking Philosopher's Way west, then going southwest for a few hundred miles. Their northern tip is east of the south part of the Haribos mountain range. They are composed of mountainous terrain.
They extend far south, nearly to the southern edge of the map. They are part of a continuous area of mountainous terrain, and blend into the Mountains of Turnwise Klatchistan (which are generally east/southeast of them).