Running
Half Marathon
21.1 km

Running
Half Marathon
21.1 km
A scenic, hilly half marathon set in the beautiful Cothi valley, with an alternative 6.5 mile route and a kids’ option — organised by Sarn Helen Running Club.
Monthly averages based on historical data (2000–present).
Register on the official organiser website.
Sign up nowLast updated: Jun 4, 2026, 07:37:22 PM
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On your marks
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