GeologyThe three peaks are composed mostly of limestone and millstone grit in alternating strata which give Ingleborough and Pen-y-ghent a distinctive, stepped appearance. Ingleborough has some impressive areas of limestone pavement, and is riddled with a network of caves, such as the White Scar Caves, and potholes which attract cavers from all over the country. It is home to England's highest waterfall at Gaping Gill, where the Fell Beck drops 110 m (361 ft) vertically down a pothole, into Britain's second largest cavern. The beck re-emerges further down the mountain at Ingleborough Cave, where visitors can take a guided tour of a floodlit part of the cave system. Whernside, being more rounded, is visually less imposing than its neighbours, but its summit is the highest point in Yorkshire. HistoryThe area is rich in historical interest. The summit of Ingleborough has the remains of a huge Iron Age hill fort, while the Settle-Carlisle Railway runs between the mountains, crossing the Ribblehead Viaduct at the foot of Whernside. Leisure
Sport and "challenges"In "The 3 Peaks Challenge" walkers aim to complete a gruelling 37.5 km (23.3 mi) to 42 km (26.1 mi) (depending on route) circuit of all three peaks with nearly 1,600 m (5,249 ft) of ascent and descent within 12 hours, starting and finishing at the same point (as detailed by Alfred Wainwright in his 1971 guide Walks in Limestone Country). The route most walkers take varies from the fell race in that most traverse the 'nose' of Pen-y-ghent from Brackenbottom Moor and do not ascend from the Pennine Way. Additionally, Whernside is generally traversed along the right of way to the east following the railway line, all of which can add extra milage to the route. The traditional route starts in the village of Horton in Ribblesdale and the Pen-y-ghent Cafe runs a 'logging' service where walkers can be timed in and out. Those who succeed become eligible for membership of the Cafe's 'Three Peaks of Yorkshire Club'. The challenge is also very popular for charity sponsored walks and Saturdays in early summer can see several hundred walkers make their way round the route.
MediaThe Three Peaks were featured on the TV programme Seven Natural Wonders as one of the wonders of Yorkshire.
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