The Old Forest
They were ‘not many miles’ from the East Road but they were misled by the baleful influence of the forest and switched further and further south and east until they scrambled down a gully to the river Withywindle.
Tom Bombadil’s house was on the west side of a hill (Fog on the Barrow-downs; Bk 1) which was apparently just called ‘Hill’ (The Old Forest; Bk 1) just as Bag End was on a hill just called ‘The Hill’. It was just outside the eaves of the Forest which ran sharply north from there.