River Blyth is in North Sea.
The River Blyth rises near Kirkheaton, Northumberland [Map] from where it flows past Bradford [Map], Belsay, Northumberland [Map], Ogle, Northumberland [Map], Kirkley, Northumberland [Map], Horton Grange, Northumberland [Map], Stannington, Northumberland [Map], Bedlington, Northumberland [Map] to Blyth, Northumberland [Map] where it reaches the North Sea.