This is a list of what are known as the Welsh 3000s, i.e. those 15 mountains in Wales which have a height of 3000 ft (914.4m) or more. Geographically they fall within three ranges, all sufficiently close to make it possible to reach all 15 summits within 24 hours, a challenge known as the Welsh 3000s challenge.

The length of this challenge (from first peak to last) is about 26 miles (42 km), but including the walk to and from any start point, this will total some 30 miles (48 km). Most people undertaking the challenge walk it, and many achieve it in much less than 24 hours. The record for the challenge (from first peak to last) stands at 4 hours 19 minutes, by Colin Donnelly in 1988. On 17/18 June 1978 John Wagstaff of West Bromwich Mountaineering Club completed a triple crossing in 22 hours 49 minutes, a feat which has yet to be repeated.

The walk is also known as "The 14 Peaks" - Carnedd Gwenllian (or "Garnedd Uchaf") is not always included, as it has the least relative height, being little more than a bump on the ridge rather than a separate summit in its own right. Many people choose to make the small diversion to include it on their traverse. There is also an option to include a sixteenth top, Castell y Gwynt on the Glyder range which has been reclassified as a Nuttall since a survey in 2007.

Coordinates: 51°09′00″N 0°29′38″W / 51.150°N 0.494°W / 51.150; -0.494

Cranleigh School is an independent English boarding school in the village of Cranleigh, Surrey. It was founded in 1865 as a boys' school. Stephen Rowland had a major role in the development of Cranleigh School. He also formed the Cranleigh Gas Company in 1876, and arranged for a mains water supply in 1886. In 1894 he laid out an estate between the Horsham and Ewhurst Roads, building New Park Road, Avenue Road, Mead Road, Mount Road and Bridge Road. He also ran a grocery store, his name is commemorated in that of Rowland House which merged with North House in 1931. Cranleigh started to admit girls in the early 1970s. It is now co-educational. The current headmaster is Guy de W. Waller, with former Cubitt Housemaster, Andrew Griffiths, as the Deputy Head.

The Good Schools Guide described the school as a "Hugely popular school with loads on offer, improving academia and mega street cred. Ideal for the sporty, energetic, sociable, and independent child."