The Quadrathon Challenge
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Event overview
The Quadrathon Challenge takes place in Inishowen, Donegal, Ireland, from 13 to 16 August 2026. The event runs over four days with separate routes each day and covers a total route distance of about 105 miles around Scenic Inishowen along the Wild Atlantic Way. Participants may choose to run or walk full marathons or half marathons on any of the days.
Entries open 28 August 2025 and close 28 July 2026. To enter participants must register or log in with SiEntries. The event offers an option to purchase XCover which may allow a refund if a participant cannot attend for unforeseen reasons.
Courses and features
- Full marathon (WARRIOR) - option to complete 1 to 4 races over the four days
- Half marathon (QUEST) - option to complete 1 to 4 races over the four days
Course features listed by the organiser include coastal and hill scenery and varied terrain. Event features include catering at the finish and finisher medals. Each day uses a different course, and participants can choose half or full marathon distances on each day. The organiser is Extreme North. Visit the organization's website for the most recent information.