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).