Brecon Beast
109km (and 71km) Welsh mountain MTB marathon over Brecon Beacons moorland and rocky byways, with big climbing — a cult charity event. Next date ~2027-09-12 is approximate; confirm the event is running.
12 September 2027Brecon Beacons (Bannau Brycheiniog), Wales109km
Get your Brecon Beast plan109km (and 71km) Welsh mountain MTB marathon over Brecon Beacons moorland and rocky byways, with big climbing — a cult charity event. Next date ~2027-09-12 is approximate; confirm the event is running.
What makes it hard
- 2800m of total climbing
- Technical terrain: open mountain moorland, rocky byways, bridleways, forestry doubletrack
How BEINA trains you for it
BEINA reads the exact demands of Brecon Beast — mtb marathon, 109km, open mountain moorland, rocky byways, bridleways, forestry doubletrack — and builds your plan around them. Race-day predictions and AI coaching remove the guesswork so you arrive ready.