Brecon Beacons Marathon
Race Day Weather
Cool start, steady conditions
Runners will face a temperature rise from 48°F at the start to 60°F by the finish, with a light wind from the WSW at 7 mph. Humidity will be moderate at 72%, making hydration important. With no rain expected, runners can focus on maintaining their pace without weather-related concerns.
Pace Calculator
Get forecast alerts for Brecon Beacons Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Race Info
The Brecon Beacons Marathon is the 43km middle distance of a four-race trail event that also includes a 52km Ultra, 25km Half Marathon, and an 11km option. Races start and finish in Talybont-on-Usk, Wales, with courses running largely on unpaved trail through Brecon Beacons National Park, including the Taff Trail, Talybont Reservoir, and the summits of Pen y Fan and Cribyn. The event was organized by The Trail Events Company and typically held in early May.