Again a bit OT, but I enjoyed seeing this advert on my train just now - Heart of Wales / Lein Calon Cymru is a very little used railway line that cuts diagonally across our small but hilly country. It traces out to ~200km so a nice little semi-classic, on paper it looks like always a sprint finish with the steady gradients (biggest climb maxes out at 1.6%) and prevailing tailwind, but bouncing around over all the railway sleepers is bound to break the group up a bit.
(Sugar Loaf station was briefly semi-famous for being the least used station in the UK, apparently an average of five passengers per month at one point, but you can't hold a title like that for long because of course train people immediately want to say they've been to the least-visited station)