Arosslach.
The ford of river Aros in East Beleriand just benieth the junktion of its two wells some 60 Miles from the Southern hills of Dorthonion. The ford provided the only pass between Himlad and Dor-Dinen. The ford was also a part of the great Ancient Road who ran from the outermost West and Vinyamar to Ered Luin.