Yorkshire Three Peaks

The peaks, which form part of the Pennine range, encircle the head of the valley of the River Ribble in the Yorkshire Dales National Park in the North of England.

However, there are now a number of "National" Three Peaks adventure challenges involving Ben Nevis, Snowdon and Scafell Pike (respectively the highest summits in Scotland, Wales and England).

The lower slopes of each of the fells are formed from massive limestones assigned to the Visean age Great Scar Group.

The upper slopes of each of the fells are formed from alternating bands of limestone and mudstone grading up into sandstone, all of which are assigned to the Brigantian and early Namurian ages Yoredale Group.

It is home to England's highest waterfall at Gaping Gill, where the Fell Beck drops 98 m (322 ft) vertically down a pothole, into Britain's second largest cavern.

The summit of Ingleborough has the remains of a huge Iron Age hill fort, while the Settle-Carlisle Railway runs between the mountains, crossing Ribblehead Viaduct at the foot of Whernside.

Additionally, Whernside is generally traversed along the right-of-way to the east, initially following the railway line, all of which can add extra distance to the route.