The Great Barrow Challenge is a 4 day walk, run, cycle charity event held in Barrow, Suffolk, East Anglia. Inspired by the Nijmegen march held in the Netherlands; the Great Barrow Challenge has progressed from a walking challenge to now include cycling and running challenges to create an ultimate challenge for people of all fitness categories. What's more it's all in aid of a good cause with many charities being supported through sponsorship of participants of the Great Barrow Challenge.