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Events / Duathlon

Harlech Duathlon 2025

Under the castle's watchful eye, the Harlech Sprint Duathlon is one of the best-loved races on the calendar. With a stunning cycle sandwiched between two short runs, it's perfect for beginners and a great season opener for the more competitive. Explore the historic town, beautiful coastline and cross the finish line to a knight's welcome!

This event is an Always Aim High Community Event. Profits from our Community Events go towards supporting amazing local projects and community groups like Harlech Triathlon Club, the Community Council and Mountain Rescue.


06 Apr 2025




Opening Date: 25.05.2024


Choose your distance

Bike rifer in the Harlech Triathlon & Duathlon rides in front of the castle

Harlech 2025


06 Apr 2025

Run: 5km

Bike: 21.5km

Run: 2.2km

Find out more Harlech Sprint Duathlon 2025

What's Included

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Lively Event Village

Music, commentary, shopping and food with a fun and supportive atmosphere

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Friendly and Inclusive

Something for everyone

Marshals at Harlech Triathlon

On Course Support

Brilliant marshals, signage and pick up vehicles

Harlech Slate Mockup

Unique Finisher Mementos!

Beautifully designed to reflect our event locations and local history.

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Spectacular location

Castles, coast and a historic town

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Professional Timing

Chip timing & live online results

Working with local communities