Clontarf Half Marathon

The Joe Duffy BMW Clontarf Half Marathon and 5 mile on 15 November 2025 is Ireland's flattest half marathon and flattest 5 mile.

The event takes place in the scenic setting of Clontarf Promenade and Bull Island, with views of Howth Head and Dublin Bay. The race is contained within an off road promenade and Bull Island giving it unique and relaxing appeal.

Both races are open to runners and walkers. The flat terrain makes it an ideal race to aim for a PB. The half marathon has pacers to help you achieve your goal. The 5 mile is all on hard surfaced ground.

The Clontarf Half Marathon and 5 mile is held twice annually - in November and July.