Longest route overland e/w or w/e
 

Ok well known I think I'm correct in saying that the longest overland route unbroken by water N>S or S>N is Ushuaia to Prudhoe Bay (Darien Gap accepted - but has been got through).

What about E>W, W>E - a quick look at Google Earth would seem to suggest Dakar to Magadan or vice-versa - would this be correct?