The One Ring: Fellowship of the New Alliance
The region known as the Grey Mountains Narrows is a long strip of land separating Mirkwood from the Grey Mountains. It extends for more than sixty leagues, from the riverbanks of the Greylin to the west, to the flat Dalelands to the east. While the region is from twenty to thirty miles wide for most of its length, it tapers to little more than ten miles where the mountains and the forest almost meet, at its opposing ends — known as the Narrows’ East and West Gaps.
The slopes of the Grey Mountains are an inhospitable waste. Before the Battle of Five Armies crushed the might of the Goblins in the North, the area was described as simply stiff with the likes of them. Now it offers a safer alternative to the dreadful pathways under the trees for those who need to get across the width of Mirkwood, but it remains a dangerous and cheerless land. Barren and very cold in winter, its climate is made only slightly more bearable by the protection offered by the mountain range itself, as the rocky barrier shields the area from the fury of the northern winds.