16km (10 miles), 571m (1873ft) of climbing, 2-3 hours ride time. Start/finish: Devil's Dyke car park (grid ref: TQ 258 111). Map required: OS Landranger 198: Brighton and Lewes (1:50,000). Lots of ups and downs over mixed terrain. One to avoid after rain, as the trail gets incredibly sticky.by Matt_Skinner