Hard as Oak obstacle races, mud run, and OCR information, distance, cost, dates, calendar, discounts, obstacles, reviews, and more

HaO is Ireland's hardest 10km obstacle course challenge and we are proud to be supporting a great charity ‘Children in Crossfire'.

Upcoming Hard as Oak Events

We don't know of any upcoming events for Hard as Oak. You can check out our list of past events and reviews below, or if you know of an upcoming race, add it to our calendar!

Browse our calendar of previous mud runs, mud races & obstacle races for Hard as Oak

Hard as Oak Reviews from the Community

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