They were intersected by well-watered, fertile valleys, referred to in Jeremiah 50:19.
Later, the region became known as Samaria, after the capital city of the northern Kingdom of Israel which was centered in the area.
Joshua was buried at Timnath-heres among the mountains of Ephraim, on the north side of the hill of Gaash (Judges 2:9).
Israel's fourth judge and prophetess Deborah lived in this region.
Her home was called "the palm tree of Deborah", and was between Bethel and Ramah in Benjamin (Judges 4:5).