Grand Union Canal 145 Mile Race (GUCR) London, United Kingdom   May 23, 2026

The Grand Union Canal Race (GUCR) is Britain’s longest, toughest, non-stop running race, and is run from the centre of Birmingham to the centre of London along the Grand Union Canal. Competitors are required to complete the 145 mile distance within the time limit of 45 hours.

Held under UK:Athletics rules and with the kind permission of British Waterways, this non-stop race is from Gas Street Basin, Birmingham, along the way-marked Grand Union Canal Towpath to Little Venice, London. Competitors are recommended to have their own support crews, but up to 40 unsupported runners can be catered for by the Organiser. Previous finishers have found Britain’s longest annual race seemingly tougher than many ultra distance events of similar distance.