Which city of refuge lay in Galilee, in the hill country of Naphtali?

Answer: Kedesh

West of the Jordan, Israel set apart Kedesh in Naphtali, Shechem in Ephraim, and Kiriath-arba (Hebron) in Judah as cities of refuge.

“So they set apart Kedesh in Galilee in the hill country of Naphtali, Shechem in the hill country of Ephraim, and Kiriath-arba (that is, Hebron) in the hill country of Judah.”— Joshua 20:7 (BSB)