The river cut the forest roughly in half from Shadowdale in Dalelands to Semberholme.
The River Ashaba, known as the River Verire to the elves, was one of two major rivers running through Cormanthor (the other was the Duathamper, or Elvenflow). The western branch that flowed out of the Desertsmouth Mountains and through southern Daggerdale was known locally as the Dagger River. The river was several hundred yards across, and more than 30 feet (nine meters) deep in some areas. Its banks sloped steeply in most places.