The hill of Mam Tor, Derbyshire, England

The mother of hills. Mam Tor, Derbyshire, England

'Shivering Mountain' is a dramatic nickname, but Mam Tor has earned it over hundreds of years. Rising above Castleton in England's Peak District, it lies within the United Kingdom's first national park, which spans 555 square miles. This landmark takes its name from Old English, 'mam' meaning 'mother,' a nod to the smaller hills it appears to cradle. Yet this 'mother mountain' is famously unstable. Its layers of shale and sandstone have caused landslips for centuries, including a collapse that permanently closed the A625 road in 1979.

Long before modern engineers battled its shifting slopes, Bronze Age people built a large hillfort on Mam Tor's summit around 3,500 years ago. The ridge still shows traces of a settlement, with roundhouses and ancient trackways that reveal its long‑standing importance.

Geologically, this 1,696‑foot peak showcases the Peak District's turbulent past. Its cliffs reveal layers formed in tropical seas over 320 million years ago, while nearby caverns—such as Blue John Cavern—hold minerals found in very few places on Earth. Today, Mam Tor remains one of the park's most iconic walks, offering a ridge path that feels both wild and wonderfully accessible.