The Quadrathon Challenge
Inishowen, Ireland • 13-16 Aug 2026
Quadrathon Challenge : Inishowen, Donegal (13–16 August 2026)
The Quadrathon is a four-day running event held in Inishowen, Donegal. It offers separate routes on each day along the Wild Atlantic Way, covering coastal and hill terrain and a total advertised loop of 105 miles. Participants can choose to run or walk each day and may enter for one to four days.
Event features include catering at the finish, finisher medals, and organised support emphasising camaraderie. Courses are described as rugged and sometimes hilly, with different routes each day under the event names WARRIOR (Full Marathon) and QUEST (Half Marathon).
Distances and entry details
- Full Marathon (WARRIOR) - run or walk
- Half Marathon (QUEST) - run or walk
- 105-mile loop total across the four days
Entries open Thursday 28 August 2025 and close Tuesday 28 July 2026. To enter, competitors must log in or register with the SiEntries system. An optional XCover purchase is offered to allow possible refunds for unforeseen circumstances. Visit the organization's website for the most recent information.