River of the Dawn
The River of the Dawn is the northern border of Mulhorand, though Mulhorand still claims to rule the Priador (Thay). This river separates Mulhorand from Thazalhar, the region of Thay that was devastated when Thay broke free of Mulhorand 400 years ago. Thay has a small settlement in this region where the Tharch and his bodyguard enforce Thay's claim on this land, though Mulhorand regularly sends troops here to enforce its own claim. There are occasional clashes, but Thay does not wish to prod Mulhorand into a full-scale war, so conflicts are carefully limited. The river is an extremely swift one, even faster than the Rauthengflow.
There is but one bridge, which is part of the Great Eastern trading road; merchants use this to bring their goods into and out of Thay. Though both nation's rulers disapprove, there is active trade between Thay and Mulhorand.