Held in The Leverhulme Stand on the day after the final A level examination of the year, students and staff enjoyed a night of dancing and fun.
Head of sixth form at the Great Boughton school, Jonathan Deakin, said: “Our event is for Year 13s who are leaving and also for Year 12s who we expect to see at two more events next Christmas and summer.
“Our students have worked so hard during study leave and this is a chance to reflect and look forward. A record number of staff attended and the students really enjoyed their presence in what was a warm and celebratory atmosphere.
“We also thank Chester Racecourse because, as ever, the event has been superbly organised for us.”