Ohio State Route 677
State Route 677 is a nearly north-south running state route existing entirely in Vinton County, Ohio. Its southern terminus is at U.S. [Route 50 in Ohio|US 50], slightly to the east of McArthur in Elk [Township, Vinton County, Ohio|Elk Township], and its northern terminus is at Ohio [State Route 278|SR 278] in Zaleski. The route passes through rural east-central Vinton County while connecting the two towns. Locally, the route is known as Powder Plant Road, as an Austin Powder Company explosives plant lies along the route.