When the weather gods deem the mountains of North Wales inclement, there’s a group of hills nearby that nearly always defy the order from on-high. The Llyn Peninsula’s Yr Eifl, is a case of three for one, and all in half a day.

For a walk which visits quiet hills and explores post-industrial dereliction, Eryri ’s Moelwyns are second to none.

■ Distance: 8½ miles/13.7km ■ Time: 5 hours ■ Grade: Challenging

Kerry Walker takes a road trip through Bannau Brycheiniog National Park

DIFFICULTY HARD SCRAMBLE GRADE 1 DISTANCE 15KM TIME ...

14.5km / 9 miles / 5-5.5 hours Ascent 777m/2550ft