Clontarf Half Marathon (November)
Clontarf, Dublin
14 Nov 2026
⚠ Start times change frequently. Always check with race organiser or their website for this year's confirmed start time before travelling.
Course map
Map based on 2025 route
⚠ This map is for indicative purposes only — routes can change, or be reversed, year to year. Check with the race organiser for this year's confirmed map.
Elevation profile
About this race
The Joe Duffy Group Clontarf Half Marathon is held twice annually, with the November edition offering a scenic out-and-back coastal route starting and finishing at EastPoint Business Park in Clontarf, Dublin. The course follows the Clontarf Promenade before crossing onto Bull Island and returning the same way. The terrain consists of smooth tarmac and well-maintained promenade paths, making it one of the flattest half marathon courses in Ireland. The course profile is exceptionally flat throughout, with no significant elevation changes, making it well suited to runners targeting a personal best. Chip timed and well marshalled, the race attracts a strong and diverse field and is a perennial sell-out. Organised by Bear Races and sponsored by the Joe Duffy Group, the event enjoys a big-race atmosphere along Dublin's north coastline.
Course profile & record eligibility
World Athletics record-eligibility rules cap net elevation loss at 1m per km of race distance, and require the start and finish to be no more than 50% of the race distance apart — both meant to stop a course gaining an unfair edge from downhill grade or a point-to-point tailwind. This is based on this course's recorded elevation and GPS data, not an official measurement or certification.