981 miles
The river explored by the spanish is the Colorado River.
Because they are two different rivers!
The Ohio River
Ohio is the closest state to the Ohio River that's why it is called the Ohio River.
The Ohio River
The Ohio River forms Ohio's southern border.
It is 981 miles = 1,579 km long.
Ohio River is a very important river in ohio
The Ohio River and Ohio River Valley boarder the southern part of Ohio.
Ohio
The Ohio River is a tributary of the Mississippi River.