Glendalough Lap of the Gap Marathon

Ireland’s Toughest Road Marathon – Reimagined The Lap of the Gap has long been a legendary cycling route — now, it’s your turn to run it. From the monastic village of Glendalough, you’ll climb through winding backroads, past the cascading Glenmacnass Waterfall, and up to the windswept heights of Sallygap, before descending by the iconic Lough Tay (aka the Guinness Lake). Both our marathon and half-marathon extend the classic loop to start in the heart of Glendalough — offering not just a race, but an unforgettable journey through one of Ireland’s most scenic and storied landscapes. This isn’t just a run. It’s an experience you’ll carry for life.