The 5 Peaks Challenge (England, Scotland, Wales, Northern Ireland and Ireland) is a very demanding challenge calling for a test of strength, stamina and determination for its many annual participants who see it as a natural progression from the UK’s 3 Peaks Challenge. To climb the 5 tallest peaks in Scotland, England, Wales Northern Ireland and the Republic of Ireland in 5 days is a memorable adventure that will bring lasting memories to treasure for all who attempt it.
- Ben Nevis is not only one of the most well-known of all the UK mountains but is also the highest mountain in the British Isles. At an elevation of 1,345 meters above sea level, it stands at the western end of the Grampian Mountains in the Lochaber area of the Scottish Highlands.
- Scafell Pike at 978 meters is the highest mountain in England and the third highest in the UK. Located in the Lake District National Park in Cumbria it forms part of the Southern Fells.
- Snowdon or Yr Wyddfa in Welsh is the highest mountain in Wales at an elevation of 1085 meters and the highest point in the British Isles outside Scotland. Situated in the picturesque Snowdonia National park it is one of the busiest mountains in the United Kingdom with over half a million people making the trip to the summit each year.
- Carrauntoohil meaning "Tuathal's sickle” is the highest mountain on the island of Ireland at 1,038.6 metres (3,407 ft). Located in County Kerry, Carrauntoohil is the central peak of the Mac Gillycuddy's Reeks, Ireland's highest mountain range.
- Slieve Donard from Irish: Sliabh Dónairt, meaning "Dónairt's mountain" is the highest mountain in Northern Ireland and the wider province of Ulster, with a height of 850 metres (2,790 ft).