Ohio State Route 604 is an east-west route in Wayne and Ashland Counties. It begins at US Route 42, several miles northeast of Ashland, and it heads east from there. Ohio Route 604 only passes through one town, and it's the tiny town of Congress, where Ohio Route 604 meets Ohio Route 539. The eastern end of Ohio Route 604 is at an intersection involving Ohio Route 94 and Ohio Route 585. This intersection is just southeast of Rittman and just southwest of Doylestown.
My photo for Ohio Route 604 comes from the western end of the route, at US Route 42 in Ashland County. The aperture looks northeast along US Route 42, and a guide marker points out the right turn onto Ohio Route 604. This photo was taken in October 2022, at the end of a long day touring around northeastern Ohio.