WLKB (89.1 FM) is a radio station broadcasting a contemporary Christian format. Licensed to Bay City, Michigan, it is a member of the K-LOVE radio network. The station's signal reaches from the West Branch area southward to north of Flint and westward to Mount Pleasant.The station began broadcasting in July 1993 as "The Rock" WTRK, a locally-originating Christian CHR/Rock station.