The AON Challenge commemorates the 1592 escape from Dublin Castle by Art O'Neill, his brother Henry, and Red Hugh O'Donnell. The Challenge is a 60km race on road and open mountain starting in Dublin Castle and finishing at Glenmalure, Co. Wicklow. This event is organised by, and solely for the benefit of Dublin & Wicklow Mountain Rescue Team. Find out more at https://artoneill.ie/