Flatout In The Fens is a new ride set in the beautiful vast open countryside around Lincolnshire and Cambridgeshire. Big horizons and flat, fast riding come as standard. Its also perfect for triathletes in training: not only because of its flat profile but also its 112-mile distance option. Flatout in the Fens is the longest cyclosportive on the UK calendar and takes place on the longest Sunday of the year. But you dont have to ride it flat out as there are shorter options too. If you are not built like a cycling mountain goat this might be the cyclosportive youve been longing for.