Also known as the Sea to Sea. 140 miles from the Irish Sea (Whitehaven or Workington) to the North Sea (Tynemouth or Sunderland).
200 miles from the Firth of Forth at Edingburgh to Newcastle on the river Tyne.
174 miles from the Irish Sea to the North Sea travelling the entire length of Hadrian's Wall.
170 miles from the Irish Sea (Morecambe - Lancashire) to the North Sea (Bridlington - East Riding of Yorkshire).
100 miles from Ilfracombe on Devon's north coast to Plymouth on the south coast.