Tenacious Ten Hour Endurance Challenge

Tenacious Ten Hour Endurance Challenge

Saturday, 9 May 2026

Pengenffordd, Talgarth, Brecon, Powys, UK

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The Tenacious Ten Hour Endurance Challenge on 9 May 2026 in the Black Mountains of Wales is a test of endurance and determination.

Participants run as many laps of a strenuous and technical 2.6 mile loop as they can in 10 hours, on a course that takes on Mynydd Troed.

Starting at Pengenfford Common at the base of the notorious Mynydd Troed, the start of the loop is a harsh and brutal climb takes you to the summit. The second part of the route, you will find runnable sections, however be prepared for some very technical and steep downhills, before you are blessed with some open common trails.

If you are still out on the course when the 10 hour horn sounds, the lap you are on will not be recorded. The event is open to teams of 4, pairs and solo entrants.

This is a cup free event - you will need to bring a reusable cup.

Organiser

Limitless Trails

Distances/Events

Multiple 2.6 mile (4.18km) laps - 10 hours

Location map

The event is based at Pengenfford Common, near Talgarth.

Please note: the map location may be approximate. Refer to the event website for start lines and course maps.

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This listing was last manually checked on 21 May 2025.

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