Carrowmore (Irish: An Cheathrú Mhór, 'the great quarter') is a large group of megalithic monuments on the Coolera Peninsula to the west of Sligo, Ireland.

Placed on a small plateau at an altitude of between 36.5 and 59 metres above sea level Carrowmore is the focal point of a prehistoric ritual landscape which is dominated by the mountain of Knocknarea to the west with the great cairn of Miosgán Médhbh on top.

To the east, in Carns townland, two large cairns overlook Lough Gill, and along the eastern boundary of the peninsula the Ballygawley Mountains have four passage tombs at their peaks.

Most of the sites are "satellite tombs" which surround the largest monument, placed on the high point of the plateau, the cairn (now restored) called Listoghil.

The monuments (in their original state) consisted of a central dolmen-like megalith with 5 upright orthostats bearing a roughly conical capstone on top, enclosing a small pentagonal burial chamber.

The leading edge of the covering stone over the entrance bears marks which may represent the only megalithic art so far found at Carrowmore.

Early unrecorded antiquarian digs disturbed the Carrowmore tombs, such as conducted by local landlord Rodger Walker in the 19th century.

Some of the material recovered is now at Alnwick castle in Northumberland, England[4] The sites were surveyed and numbered by George Petrie in 1837, while William Gregory Wood-Martin made the first recorded excavations in the 1880s.

This data set is supported by palaeo-environmental studies in adjacent lakes conducted by Stolze, O'Connell, Ghilardi and others, showing farming activity coincident with or preceding monument use.

[10] The analysis of ancient DNA derived from human bone shows a web of connections between occupants of monuments of the Irish Passage Tomb Tradition.

[13] The role of megaliths as monuments and foci of ceremony and celebration, as well as markers on the landscape is emphasised by archaeologists such as Richard Bradley; but they were also memorials to particular lineages and possibly individuals from elite groups.

[14] The building of large cairns such as Listoghil or Miosgán Médhbh on Knocknarea may represent a later phase of megalith-building of greater scale and ambition than the earliest passage tombs.

The area of the Cúil Irra peninsula and its hinterlands is dotted with such tombs, often on hilltops, which inspired Stefan Bergh to style it the "Landscape of the Monuments".

Carrowmore was the subject of an extended legal battle during the 1980s when in 1983 Sligo County Council sought to place a municipal landfill dump on a quarry site about 100 yards from part of the complex.

It houses an exhibition and, from March to the end of October, provides both guided tours and multi-lingual self-guide options for the Carrowmore megaliths.