Ben Nevis is the highest mountain in the UK at 1,345 metres and a bucket-list climb for hikers of all levels. The popular Mountain Track (often called the Tourist Route) offers a steady but long ascent, while more experienced walkers might explore the Carn Mor Dearg arete. Expect rapidly changing weather and a challenging descent — this is a serious mountain despite its popularity. On a clear day, the views across the Scottish Highlands are some of the best in Britain.