20 cardiff garth hill

Andrew Galloway walks a linear route that’s a microcosm of Wales’ best bits

■ Distance: 8¾ miles/14.2km ■ Time: 4 hours ■ Grade: Moderate

Roger Butler peers over steep slopes on a roller coaster along Offa’s Dyke

You don’t need all day to have a big adventure, as this Holy Mountain proves.

■ Distance: 11½ miles/18.2km ■ Time: 7 hours ■ Grade: Challenging

THE area where the River Tees approaches the sea has been largely industrial in recent times, but the upper stretch of the river is very different in character. Here, while the villages, hamlets and r