Torc Waterfall (from Irish Easach Toirc, meaning 'cascade of the wild boar')[3] is a 20 metres (66 ft) high, 110 metres (360 ft) long cascade waterfall formed by the Owengarriff River as it drains from the Devil's Punchbowl corrie lake at Mangerton Mountain.

One legend is of a man who was cursed by the Devil to spend each night transformed into a wild boar, but when his secret was revealed by a local farmer, he burst into flames and disappeared into the nearby Devils Punchbowl on Mangerton Mountain from which the Owengarriff River emerged to hide the entrance to his cave beneath the Torc Waterfall.

[5][6] There is also the story of how the legendary Irish warrior, Fionn MacCumhaill, killed a magical boar on Torc mountain with his golden spear.

[10] Killarney National Park has a number of loop-trails around the Torc Waterfall of varying lengths, called the Blue, Yellow and Red Trails.

[12] The Red Trail climbs Cardiac Hill (also called Huntsman's Hill or the Cardiac Steps), and involves climbing a very steep series of stone steps (the starting point is half a kilometre west of the waterfall car-park off the N71)[13] to an observation point and stone beehive hut, half-way up Torc Mountain at circa 300 metres (980 ft),[14] giving views of the Lakes of Killarney, and then looping back eastwards to join the Old Kenmare Road and descend via Torc Waterfall.