From wild swimming to climbing an active volcano or tackling a via ferrata, our tipsters share their most thrilling open-air achievements
Walk 230 miles in Scotland and go days without seeing anyone. I navigated the unmarked trail, at times with no path, through soaring mountains and wild landscapes, across swollen rivers and beaches with sand as white as anything in the Seychelles. Starting at Fort William with a boat crossing, the trail hugs the rugged west coast, dipping in and out of sea lochs, and ends at the lighthouse at the most north-westerly tip of the UK. The last seven miles is through an MOD firing range. Wild camp by the finest salmon rivers, or stay in welcoming bothies from another era. It’s an adventure that draws walkers from all over the world.