Dublin City Half Marathon: Route, Road Closures, and Event Guide

The Dublin City Half Marathon took place on Sunday, May 3, 2026, bringing thousands of athletes to the streets of the Irish capital for a sold-out event.

The race featured a significant competitive field, headlined by Killian Mooney, who entered the event as the defending champion. According to reporting from The Irish Times, Mooney sought to retain his title in a race that reached full capacity prior to the start date.

Participation and Scale

The scale of the 2026 event was marked by high demand, though reporting on the exact number of participants varied across outlets. RTE.ie reported that over 13,000 individuals were set to take part in the marathon.

Conversely, the Irish Mirror reported that 12,500 runners participated in the event. Regardless of the final tally, the race remained sold out, reflecting the continued growth and popularity of the distance event in Dublin.

Urban Impact and Logistics

The event necessitated extensive logistical coordination across the city centre. The Journal reported that road closures were implemented throughout the city centre to accommodate the thousands of runners on the course.

These closures created significant shifts in local traffic and public transport patterns. Dublin Live provided detailed guidance for residents and visitors, outlining the specific route, timing of the closures and the location of the bag drop for participants.

Organizers managed the flow of the race through a structured system of road blocks and timing checkpoints to ensure the safety of the runners and the efficiency of the event’s progression through the urban environment.