That’s race 3 out of 4 races completed for the GB Ultras 2025 100-mile Grand Slam series. The Race Across Bannau Brycheiniog, the Brecon Beacons National Park! The Beacons Way 100 mile ultra is just over 100 miles starting from the ruins of Abergavenny Castle and following the Beacons Way National Trail all the way…