E2E stands for
"End to End"
Land's End to John o' Groats
Abbreviated LEJOG (or JOGLE when covered from North to South) is the journey from the South West tip of England to the the North East tip of Scotland. It is from one end of Britain to the other.
It is sometimes known as "End to End" hence the name of this site E2E.
Land's End is the extreme southwestward (but not southern or western) point of Great Britain, situated in western Cornwall.
John o' Groats is the traditionally acknowledged extreme northern point of Scotland, in northeastern Caithness.
The distance by road is 874 miles (1,407 km) and takes most cyclists ten to fourteen days; the record for running the route is nine days. Off-road walkers typically walk 1,200 miles (1,900 km) and take two or three months for the expedition.
The route I have planned is 940 miles.