§ Of Beren and Lúthien The Silmarillion

Northward they rode, for they intended in their haste to pass through Dimbar, and along the north marches or Doriath, seeking the swiftest road to Him ring, where Maedhros their brother dwelt; and still they might hope with speed to traverse it, since it lay close to Doriath's borders, shunning Nan Dungortheb and the distant menace of the Mountains of Terror.