Phoenix Running - Trelewis
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Event overview
Phoenix Running South Wales is staging the Butterfly Run on Saturday 11 July 2026 at Rock UK Summit Centre, Parc Taf Bargoed, Trelewis, Merthyr Tydfil, CF46 6RD. The event uses flexible "rock up and run" starts with staggered starts and a 7-hour time limit. A supersized spinning finishers medal is offered to participants, with a no-medal entry option available at a reduced price. Entry places are strictly limited. A Welsh Athletics race license has been applied for.
Course, distances and entry
The event is lap-based on a 5.3 km (3.28 mile) out-and-back course through Parc Taf Bargoed. The surface is mainly tarmac paths with about 0.5 miles on riverside trail. Each lap has approximately 37 m elevation gain and loss, and the course is described as largely flat.
Distances available include:
- 5 km
- 10 km
- Half marathon
- Marathon
- Ultra
Minimum distance is one lap (3.28 miles) or as far as a participant can go within the 7-hour limit. Pricing shown in the source text is £33.00 (affiliated), £35.00 (unaffiliated), and a trial no-medal option from £20. The organiser provides aid stations, same-day results, digital BIBs, and digital finishers certificates. Visit the organization's website for the most recent information.
