■ Distance: 5½ miles/8.8km ■ Time: 3 hours ■ Grade: Moderate

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

■ Distance: 5¼ miles/8.5km ■ Time: 2½ hours ■ Grade: Easy

■ Distance: 6¾ miles/10.8km ■  Time: 3½ hours ■  Grade: Moderate

■ Distance: 6½ miles/10.5km ■ Time: 2½ hours ■ Grade: Moderate

Reservoirs, brooks and sculptures make for a ‘dam’ good autumn walk in this western Sheffield wilderness