The ecology of Lough Scur, and indeed all county Leitrim lakes, is threatened by pollution and invasive species such as curly waterweed, zebra mussel, and freshwater clam.

[3] However, it is pointed out the word "Scur" (Irish: Scor, genitive scuir) has various meanings, and probably translates to "lake of the horse-stud".

[2] Lough Scur is deep with generally a soft mud or compact peat bottom, the shallowest portion is the northern reach, between Driny and Drumcong, probably due to the large quantity of detritus carried into it by a mountain stream at Kiltubrid townland.

The original canal was constructed in the 1840s, fell into decline as the rail network prospered, but was reopened in 1994 to develop the region's tourism industry.

The recording of large numbers of ancient dug-out canoes from county Leitrim remind us that waterways have always been a key means of transport in Ireland.

The pre-Bronze Age material were described as flat, circular sites of stones, 6-10m in diameter and 400 cm above the lake mud.

Charred animal bones were found on the surface,[19] indicating swine (wild boar, domestic pig) and oxen were part of the diet.

[28][29] Pre-Celtic archaeological remains from Lough Scur are preserved by the Royal Irish Academy museum and National Museum of Ireland- An ancient stone monument, probably a Druids Altar,[34] is prominently located 400 yards south of the lake in a sloping pasture anciently named Irish: Aghascur, meaning 'field of the Scur'.

[3] Set against the spectacular backdrop of Lough Scur and Slieve Anierin, it is marked "Dermot and Grania's Bed" on some maps.

[35] Although two erect stones at the south have certainly been artificially set upright, this anomalous monument is extremely doubtful and, on the evidence, cannot be accepted as a megalithic tomb, but rather an attempt to split a rock outcrop from underlying bedrock.

[37][n 7] Defending the Conmhaícne of Muintir Eolais from Norman conquest was a military objective, and in 1270AD his Lough Scur regiment and Conmhaicne forces both participated in the decisive Battle of Áth an Chip.

Dilapidated ruins of Castle Sean (Irish: Caisleán Seóin) remain today, but are not preserved as national monument, tourist, or heritage site.

[44] Tradition recalls many people being hanged on the island,[45] and that Sean was killed by a soldier from Longford avenging his sister's death there.

[48] "Book of LoughScur - A book or manuscript bearing this title, on the Reynolds family (ancient name MacRannal or Magrannal), County Leitrim, was heard of about three years ago in the neighbourhood of Keshcarrigan, County Leitrim, as having been seen in the library of a gentleman who had died a little while previously; but his name was not ascertained.