'Mountainous' in the Bible

Shechem was allocated to them as a city of refuge for unintentional killers, along with its pasture lands, in the mountainous region of Ephraim, Gezer with its pasture lands,

they buried him in his territorial inheritance at Timnath-serah in the mountainous region of Ephraim, north of Mount Gaash.

Later, Aaron's son Eleazar also died, and they buried him at Gibeah, which belonged to his son Phinehas, and which had been given to him in the mountainous region of Ephraim.