"They passed over the tumbled stones and began to climb; for Amon Rûdh stood upon the eastern edge of the high moorlands that rose between the vales of Sirion and Narog, and even above the stony heath at its base its crown was reared up a thousand feet and more. Upon the eastern side a broken land climbed slowly up to the high ridges among knots of birch and rowan, and ancient thorn-trees rooted in rock."