This is a list of Furth mountains in Britain and Ireland by height. Furths are defined as mountains that meet the classification criteria to be a Scottish Munro, including being over 3,000 feet (914.4 m) in elevation, but which are furth of (i.e. "outside" of) Scotland.^[1][2][3] They are also called Welsh Munros, Irish Munros,^[4] and English Munros respectively, or the three-thousanders,^{[lower-alpha 2]} as in The Welsh 3000 challenge.

Some Furth definitions add a topographical prominence above 30 metres (98 feet), akin to a Scottish Murdo, however the official Scottish Mountaineering Club ("SMC") lists includes Furths with a prominence below this level.^{[lower-alpha 1][5]} Applying the Real Munro definition to a Furth, requires a prominence above 150 metres (492 feet), akin to a Marilyn, and these 14 Furths are marked with (‡) in the tables below.^[6]

The SMC lists 34 Furths: six in England, 15 in Wales, and 13 on Ireland.^[7] These compare with 282 Munros and 227 Munro Tops in Scotland.^[8] Thirty three have the 30 metres (98 feet) in prominence to be Murdos. Fifteen have the 150 metres (492 feet) of prominence to be Real Munros: four in England, six in Wales, and five in Ireland. Ten have the 600 metres (1,969 feet) in prominence to be P600s, which being over 3,000 ft, makes them "Super-Majors": three in England, three in Wales, and four in Ireland.

Climbers who complete all Munros, and the SMC list of 34 Furths, are called Furthists; the SMC keeps a register which numbered 631 Furthists at October 2018.^[9] The first Furthist is registered as James A. Parker who completed all 34 Furths on 19 April 1929 (having become a Munroist in 1927).^[10] In 1986, Ashley Cooper became the first person to climb all the 3,000 ft summits in one continuous expedition, of 111 days, 2,500 km (1,600 mi), and 150 km (93 mi) of ascent.^[10][11]

This list was downloaded from the Database of British and Irish Hills ("DoBIH") in October 2018, and are peaks the DoBIH marks as being Furths ("F").^{[lower-alpha 3][14]} The SMC updates their list of official Furths from time to time, and the DoBIH also updates their measurements as more detailed surveys are recorded, so these tables should not be amended or updated unless the entire DoBIH data is re-downloaded again.

The following are a breakdown of Furths by country, and also marking the highest mountain classification grade by prominence (e.g. P600, Mayilyn, Hewitt etc.).

The DoBIH uses the following codes for the various classifications of mountains and hills in the British Isles, which many of the above peaks also fall into:^[15][16]

suffixes:
= twin

• Lists of mountains and hills in the British Isles
• List of mountains of the British Isles by height
• Lists of mountains and hills in the British Isles
• Lists of mountains in Ireland
• List of Munro mountains
• List of Murdo mountains
• List of Marilyns in the British Isles
• List of P600 mountains in the British Isles