24 highland ben macdui

■ Distance: 7½ miles/12km ■ Time: 4-5 hours ■ Grade: Challenging

■ Distance: 6 miles/9.7km ■ Time: 2½-3hours ■ Grade: Easy

The coldest place in Britain is also one of the most beautiful, as this winter walk in the sub-arctic hills of the Cairngorms proves.

■ Distance: 11 miles/17.5km ■  Time: 6 hours ■  Grade: Challenging

Some mountains live up to their names better than others. BEN MORE is one that certainly does, but first we need some disambiguation: exactly which Ben More are we talking about?

After crossing Scotland on foot following their own bespoke routes, graduates of the TGO Challenge Class of 2025 tell first-hand tales of heatwaves, high camps and bog-trotting through the landscape on this truly unique long-distance journey