Three people sustained serious injuries and were transported to hospital after a pick up truck and five motorcycles crashed on County Road 503 on Sunday.
The OPP says while traveling eastbound, the truck passed five motorcycles and struck the lead one, causing a crash with all the vehicles.
One person was transported to a trauma centre in Toronto, and two people were air lifted to the local hospital. Police report all three were in stable condition later that day.
The road was closed in both directions between Hobbits Lane and Bacon Road in Furnace Falls, while OPP processed the scene.
The investigation is still ongoing, and anyone with information is asked to call OPP or Crime Stoppers.