The route
This verified 186-mile circuit begins in Llandovery and reaches the A4069 by Llangadog before crossing Black Mountain Pass to Brynamman. The route then continues through the upper Swansea Valley to Brecon.
Day two crosses the eastern park to Crickhowell, Llanthony and Gospel Pass before reaching Hay-on-Wye. The final stages return through Brecon to Waterfall Country and finish beside the A470 at Storey Arms beneath Pen y Fan.
These are working mountain roads rather than a closed driving course. Sheep, cyclists, walkers, fog and heavy rain can change the safe pace immediately. Check Traffic Wales and the current forecast before each stage, and use only legal parking areas.


