'Hill Country Of Ephraim' in the Bible

There was a man from Ramathaim Zophim, from the hill country of Ephraim, whose name was Elkanah. He was the son of Jeroham, the son of Elihu, the son of Tohu, the son of Zuph, an Ephraimite.

So Saul crossed through the hill country of Ephraim, passing through the land of Shalisha, but they did not find them. So they crossed through the land of Shaalim, but they were not there. Then he crossed through the land of Benjamin, and still they did not find them.

When all the Israelites who had hidden themselves in the hill country of Ephraim heard that the Philistines had fled, they too pursued them in battle.