Welcome to the Jurassic Coast Ultra. Run, walk or crawl a marathon a day for three days along the stunning Jurassic Coastal Path in Dorset. Three marathons in 3 days are the original Jurassic Coast Challenge format that is challenging but achievable by most. Runners, joggers, and walkers all take on the challenge and start at different times each day. The daily routes are marked on issued maps but don’t require much navigation to follow, as the coastal footpath is well-marked along the way.