(Marathon, ON) - Highway 17 remains closed in both directions near Heron Bay Road, just outside of Marathon, following a serious collision.

On August 21, 2025, at approximately 6:15 am, members of the Marathon Detachment of the Ontario Provincial Police (OPP) responded to a collision involving a transport truck, an SUV and a pickup truck. One male was transported to the hospital with serious injuries. The collision prompted a full closure of the highway.

Highway 17 remains closed in both directions as police continue to investigate, and crews work to clear the scene. Motorists are advised to avoid the area and expect significant delays.