Ulthos is separated from Asshai and the Shadow Lands by the Saffron Straits, which link the Jade Sea to as-yet unknown seas further east. The island of Ulos lies off the north coast of Ulthos. Only the extreme northern coast of Ulthos appears on maps and is almost entirely lacking in details, save for the existence of a large river emptying into the Jade Sea and a dense covering of dark forest covering much of the surrounding land.