How many days did the spies hide in the hill country after leaving Rahab's house?

Answer: Three

Rahab told them to hide in the hill country for three days, and they stayed there until their pursuers gave up.

““Go to the hill country,” she said, “so that your pursuers will not find you. Hide yourselves there for three days until they have returned; then go on your way.” So the spies went out into the hill country and stayed there three days, until their pursuers had returned without finding them, having searched all along the road.”— Joshua 2:16, 2:22 (BSB)