All 275 Peaks
Running All 275 Irish Mountains
275
Mountains > 600m
21 days
Record Time
72,000m
Total Elevation
Wettest
Summer on Record
Every mountain in Ireland over 600 metres, linked together in a single continuous project. 21 days later, all 275 were done. Not by heroics — by showing up, again and again.
Every mountain in Ireland over 600 metres, linked together in a single continuous project. 21 days later, all 275 were done. Not by heroics — by showing up, again and again.
In August 2024, Killarney native Sean Clifford set a new record by summiting all 275 of Ireland’s mountains over 600 m (the Vandeleur-Lynams) in just 21 days, 2 hours and 47 minutes — more than halving the previous record of 47 days.
He covered 929 km and gained 72,000 m of elevation (roughly the equivalent of climbing Everest from base camp 20 times), starting on Maumonght in Galway on 7 August and finishing on the Towmies in Kerry on 28 August.
The unplanned challenge began after he was dared to run every mountain in Galway; he then continued through Mayo, Sligo, Donegal and the rest of the country. He battled relentless wet and windy weather, swollen ankles, a ripped quad, near-hypothermia, sleep deprivation and even chest-deep bog in a Mourne Mountains storm — all while wearing the same pair of socks for the entire 21 days.
What It Took
- Logistical planning across the length and breadth of Ireland
- Daily route revisions dictated by weather and river levels
- Recovery protocols compressed into hours between summits
- A support team willing to drive, feed, and re-boot at any hour
Key Lessons
- Consistency compounds — every day forward is progress
- Conditions are neutral; the story you tell about them is not
- Community makes the impossible feasible
Gallery
In the Press
Clare FM
Man Breaks Record for Climbing All 275 Irish Mountains
Irish Independent
Kerry man sets new world record in scaling Ireland’s 275 mountains
Radio Kerry
Kerryman Sean Clifford Sets New World Record for Scaling Ireland’s 275 Mountains
Killarney Advertiser
Killarney man breaks record for climbing 275 Irish Mountains
The Irish Sun
Kerryman sets new record for scaling 275 of Ireland’s mountains in just 21 days – and he only wore one pair of socks
Kerry's Eye
Sean’s amazing record-breaking rush across 275 mountains
Killarney Advertiser
Killarney ultra-runner Sean Clifford nominated for national awards
“You don't have to feel ready. You just have to start walking.”