^Looking south from the interchange with US Route 35, April 2025.
Ohio State Route 850 is a 5-mile north-south route in Gallia County, in southeastern Ohio. It connects Bidwell in the north to Rodney in the south, and it passes through a diamond interchange with US Route 35 midway along its pathing. The northern end at Bidwell is at Ohio Route 554; the southern end at Rodney is at Ohio Route 588. Ohio Route 850 is fairly straight and short, and it sits about 5 to 10 miles northwest of Gallipolis, Ohio.
My photo for Ohio Route 850 shows a guide marker pointing out the northern beginning of Ohio Route 850 to drivers going west on Ohio Route 554 in Bidwell. This photo was taken in April 2025 during a slight detour I made from a drive down all of US Route 35, from one end of that US highway to the other.