Big Country 103.9 — CHOK

Big Country 103.9 (CHOK-FM) is a Canadian country radio station based in Sarnia, Ontario, broadcasting on 1070 AM with an additional FM repeater at 103.9 FM. Owned by Blackburn Media, it delivers a blend of modern country tracks and timeless classics, appealing to both longtime fans of the genre and younger audiences. The station has been part of the region’s media landscape since 1946, evolving through several musical formats before adopting its current identity in May 2026. Along with music programming, listeners receive local news, weather updates, and traffic reports relevant to Southwestern Ontario. The station also serves as a broadcast partner for the Toronto Blue Jays and the Sarnia Sting, while regular music programming continues online during baseball coverage. Its signal reaches beyond Canada into nearby U.S. areas such as Port Huron, Michigan.

Big Country 103.9 combines regional information, sports coverage, and a wide-ranging country playlist, helping it remain a familiar and trusted station for audiences on both sides of the border.