The Rapha Lincoln Grand Prix (formerly the Witham-Valley Grand Prix) is a road bicycle race that starts and finishes in Lincoln. The 2021 version was 166 km long. The race is characterised by its ascent of Michaelgate, an iconic cobbled climb in the centre of Lincoln with a maximum gradient of 20%. The Lincoln GP has ran since the summer of 1956, making it the oldest annual bike in the UK, that still runs today.