A sea swim, a hilly 112-mile bike loop and four laps of Tenby, with the whole town out to watch. Also the day the roads shut.
Ironman Wales has a reputation among triathletes for being brutal — a sea swim, a bike course with over 2,000 metres of climbing and a run of four laps around the town — and a reputation among everyone else for the crowds. The whole of Tenby turns out. The next race is on Sunday 19 September 2027; for beds, closures and the train, see where to stay for Ironman Wales.
The swim starts on North Beach early in the morning (7am in 2026). Athletes run down from the town, and the cliff paths and walls above the beach are packed with people watching a mass start in the dark and cold. It is the single best moment of the day and it is free.
The bike loops out through Angle, Pembroke, Narberth and back, with the climb out of Saundersfoot — universally known as Heartbreak Hill — lined so densely with spectators that riders go through a tunnel of noise.
The run laps the town. The Esplanade above South Beach and the narrow streets around the walls are the loudest places in Wales that afternoon. It goes on well into the night, and the last finishers get the biggest reception.
The honest bit. Roads on the course are closed for most of the day and there is no getting around it. If you are staying in south Pembrokeshire and not involved, you are effectively parked up until the evening. Read the road closure map before the weekend, do your shopping the day before, and if you need to be at an airport or a station on that Sunday, leave absurdly early.
If you are here anyway, watch it. It is extraordinary.
A full-distance triathlon based in Tenby: a sea swim from North Beach, a bike course through south Pembrokeshire and a run finishing in the town centre. Roads on the course are closed for most of the day.
More than 3,000 athletes race on one fixed Sunday, so beds near Tenby are in demand for the weekend. See where to stay for Ironman Wales. If you are not here for the race, plan around closed roads.
Before you plan around this
Dates change every year — check with the organiser before you travel
Run by Ironman.
We don't sell tickets and take no commission on any of these — links go straight to whoever runs it.
Accommodation books up around the bigger events — Tenby especially.
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