Within the Echoriath, the Encircling Mountains, just west of Dorthonion and east of the River Sirion, lay a round level plain with sheer walls on all sides and a ravine and tunnel leading out to the southwest known as the Hidden Way.
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To the west and south it had a long shore with the Great Sea Belegaer, to the north were the highland regions of Hithlum, Dorthonion and the hills of Himring, to the east the Ered Luin reached nearly to the sea.
An article discussing the significance of forests in Tolkien's work, in particular, the Old Forest with comparisons to other myths and romances.