Every year, the pupils at Gresham's take on a 5km course around the school site included muddy ditches, obstacles in the woods and a giant slip and slide. Staff periodically ambush them with water pistols and dry paint making it a very fun day for all involved.

The event raises money for the School's charity, Holt Youth Project, a local charity which aims to provide a safe environment for young people to meet and socialise with the minimum of supervision, building their social communication skills and promoting ownership.