Brecon to Cardiff Xtreme
Nantgarw, United Kingdom • 1 Mar 2026
Event overview
The Brecon to Cardiff Xtreme and the Taff Xtreme Marathon are linear trail races on 1 March 2026 with the event base and finish at Coleg y Cymoedd, Parc Nantgarw, Nantgarw, CF15 7QX. The Xtreme is a mountain ultra that crosses multiple peaks and is held in winter conditions. Navigation skills and mountain running experience are required.
Distances
- Brecon to Cardiff Xtreme: 47.5 miles / 75 km
- Taff Xtreme Marathon: 26.2 miles
The Xtreme features around 2,680 m of ascent and the marathon about 1,300 m of ascent. Both routes are linear and use the same finish location.
Route, logistics and facilities
The Xtreme starts in Brecon and passes major high points including Pen y Fan, Cribyn and Fan y Big, then continues over additional ridges and forestry before finishing in Cardiff. The Marathon covers the second half of the Xtreme route, starting at Merthyr and joining the ultra route near the halfway checkpoint.
The course is unmarked in places and navigation is by GPS trace; runners must be self-sufficient and carry compulsory kit as listed by the organiser. There are six manned checkpoints on the Xtreme and three on the Marathon, offering water, drinks and snacks. The event base provides parking, a café, large indoor registration area, toilets, changing rooms and showers. As this is a linear event, coach transport is provided from the finish area to the starts for competitors who use it. Visit the organization's website for the most recent information.