The Quadrathon Challenge
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Event
The Quadrathon Challenge takes place Thursday 13th to Sunday 16th August 2026 in Inishowen, County Donegal, Ireland. The event runs over four days with four different courses and covers a 105-mile loop. Participants may run or walk on separate routes each day. Entries open 28 August 2025 and close 28 July 2026. Online entry and an entry list are available through the event organiser's SiEntries pages.
Courses and features
- Full Marathon - WARRIOR (Run / Walk)
- Half Marathon - QUEST (Run / Walk)
Races follow coastal and hill terrain along the Wild Atlantic Way, with varied, sometimes hilly surfaces. The event offers catering at finish locations and finisher medals. Participants can choose to enter for one day or for multiple days, up to all four. The organiser provides an option to purchase XCover insurance for possible refund if participants cannot attend due to unforeseen circumstances. Visit the organization's website for the most recent information.