Overview
Mangerton is a big, broad bog dome rather than a rocky peak, rising south of Killarney in County Kerry. Where MacGillycuddy’s Reeks next door are all ridge and rock, Mangerton is soft, spongy blanket bog underfoot on its upper slopes. The Irish name, An Mhangarta, is usually read as ‘the long-haired mountain’, though some trace it to mangartach, ‘quaking’ or ‘moving’, a fair description of wet ground.
The Devil’s Punchbowl below the top gives the mountain a sharper outline. Killarney National Park identifies the lake basin as a glacial corrie. Its broad upper slopes can feel featureless in cloud.
Walking routes
Destination Killarney describes the mountain walk near Torc, with views back towards the Lakes of Killarney and the Reeks. Choose an established route with current access, and allow time to navigate back across wet and exposed ground. A walk to the corrie still involves a mountain approach.
The plateau is open and featureless, so carry a map and compass and know how to use them. A downloadable GPX helps; it doesn’t replace navigation.
The Devil’s Punchbowl and the glacial lakes
The Devil’s Punchbowl (Poll Ifrinn) is the mountain’s defining feature: a deep, oval corrie gouged out by Ice Age glaciers, holding a dark, still lake that spends a lot of its time under low cloud. Its outflow feeds the Owengarriff River, which drops over Torc Waterfall to the Lakes of Killarney below. Keep back from the steep ground around the lake.
Other glacial lakes spill from the corries into Horse’s Glen, including Lough Garagarry, Lough Mannagh and the hanging Lough Erhogh. The plateau in between is Devonian sandstone under a thick skin of blanket bog, all tussock and peat hags. In poor visibility it can be disorienting, which is the honest caveat for this hill.
History and legend
The far northern flank holds the Tooreencormick battle site (Tuairín Cormaic), a 13th-century clash between the Mac Cárthaigh and the Anglo-Norman FitzGeralds, marked now by a stone monument.
The folklore is better fun. One tale has the chieftain O’Donoghue Ross dining with the Devil on the mountain; after a row, O’Donoghue punched him and bolted, and the Devil bit a chunk out of the summit and flung it after him. The chieftain ducked, the rock sailed on and landed in Tipperary as the Rock of Cashel, and the hole it left filled to become the Punchbowl. Another story makes the corrie a hiding place for the lovers Diarmuid and Gráinne.
Wildlife
Above the treeline the bog carries butterwort, bog violet and dwarf willow, with heather and gorse colouring the lower slopes in summer. Ravens, kestrels and peregrine falcons work the air over the corries, and deer graze the higher ground.
Practical information and safety
- Planning: use Kerry Mountain Rescue’s hillwalking guidance, carry a map and compass, and turn back if visibility or conditions deteriorate.
- Getting there: check current access and parking before you travel, as arrangements can change.
- Cost: there is no admission charge.
- Facilities: none on the mountain. Carry water, food and layers.
- Gear: waterproof boots, waterproofs and a warm layer. Mobile signal on high ground can be unreliable.
- Weather: conditions turn fast, with mist, wind and a sharp drop in temperature. Start early, share your route and turn back if the cloud comes down.
Nearby
For a lower-level outing, choose one of the national park’s mapped walks around Torc or Muckross. Torc Waterfall, fed by the Punchbowl’s outflow, is a short stop near the road. For a quieter follow-on, the Black Valley has low woodland walks, or drop into Beaufort for coffee and supplies.