Olentangy Heritage Corridor
Spanning only 10.5 miles, the Olentangy Heritage Byway is the shortest in the state. The byway begins at I-270 in Franklin County and continues to follow the ancient Indian trails of the Olentangy River to US 23 in Delaware County. State Route 315 was also documented as the first road commissioned in Delaware County in August of 1808, and it remains a significant north-south arterial to present day.