Methedras and Fangorn
Wellinghall was a long way up the river, nearly at its source. (Treebeard; Bk2). Treebeard said he had brought the Hobbits 70,000 Entstrides, but the length of an Entstride is not given. . If Treebeard was 14ft tall his stride (by comparison with a 3 ft stride for a 6 ft man) was probably something in the order of 6-7 ft.
The forest of Fangorn skirted the slopes of Methedras, which was the last peak of the Misty Mountains. (Treebeard; Bk 2).
Leaving Wellinghall the next mornig, Treebeard went south and then east into the forest to Derndingle. The Ents left Derndingle in the afternoon going southward down a long fold of the foothills and up onto the high western ridge – high enough to be just above the treeline. They reached the crest after dark and went on down a long ravine into the upper part of the valley. (Treebeard; Flotsam and Jetsam; Bk 2).