Share Facebook WhatsApp Twitter Email LinkedIn Pinterest The Goorooyarroo Off Road Half Marathon on Saturday, 15th September 2018 runs through Goorooyarroo Nature Reserve & Mulligans Flat in Canberra, ACT. There is a half marathon, 10.5km and relays at this event organised by the YMCA of Canberra Runners Club. Distances/Events Relays and 10.5km 21.1km