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

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.

Jim Perrin revisits a minor but notable hill of the Rhinogydd, in the fine company of campaigning photographer Fay Godwin and archaeologist Peter Crew

DIFFICULTY MEDIUM DISTANCE 10KM TIME 4-6 HOURS TOTAL ASCENT ...

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

DIFFICULTY MEDIUM DISTANCE 8.2KM TIME 4-6 HOURS TOTAL ASCENT ...