Purple Mountain | Kerry

Overview

Purple Mountain (Irish: an Sliabh Corcra) rises to 832 metres on the eastern edge of Killarney National Park. Its slopes are built from Old Red Sandstone, a Devonian rock formation that catches the morning and evening light in a distinct violet-reddish hue. This geological feature inspired the 19th-century English name, though older maps and local records referred to the entire massif as Tomies. According to place-name scholar Paul Tempan, the traditional Irish form likely derives from Tuamaidhe, referencing two ancient burial cairns on the summit. As the English name gained popularity, the older title was relegated to the lower neighbouring peak, Tomies Mountain.

The mountain qualifies as an Arderin, Hewitt, Simm, and Marilyn, sitting just shy of the 600-metre prominence threshold that would classify it as a “Sub-major” peak. Its eastern half falls within the national park boundary, where lower slopes still hold pockets of ancient oak woodland – a living remnant of Ireland’s pre-human forest cover.

Walking Routes

Walkers have three established approaches, each offering different levels of challenge and scenery. All routes require a solid level of fitness and basic navigation skills.

The Classic Gap of Dunloe Loop

The most popular option is a 14-kilometre, 5–6 hour circuit starting at Kate Kearney’s Cottage. The path follows the tarmac road through the Gap of Dunloe, passing Black Lough and Cushnavally Lake before reaching the Head of the Gap. From there, the trail climbs eastward past Lough Glas, then turns north to a 793-metre subsidiary peak. A short ridge walk leads to the main summit, followed by a traverse to Purple Mountain NE Top (757 m), Tomies Mountain (735 m), and finally Tomies Rock (568 m). The descent drops via the steep gullies of Tomies Chimneys back to the cottage. This route delivers uninterrupted views of the Lakes of Killarney and, on clear days, the full sweep of MacGillycuddy’s Reeks.

Direct Summit Ascent

For a quicker objective, a 7-kilometre, 3–4 hour climb starts at the Head of the Gap and ascends directly to the summit and NE Top before retracing the descent. Parking at the Head of the Gap is restricted to roughly five roadside spaces, making this option best suited for early starters or those using a jaunting-car transfer from Kate Kearney’s.

The Tomies Chimneys Variation

A more rugged 9-kilometre, 4–5 hour route begins at Kate Kearney’s Cottage and tackles the Tomies Chimneys gullies first. The path climbs steeply to Tomies North Top, links up with Tomies Mountain, and then traverses the ridge to Purple Mountain before returning to the start. This variation offers greater isolation and a more technical descent, but requires careful route-finding through the heather.

The ridge sections between Purple Mountain and Tomies North Top are not waymarked on the ground. Hikers should carry the OSI Discovery Series Map No 78 or the OSI Adventure Series – Macgillycuddy’s Reeks 1:25 000, along with a compass or GPS device. The paths around Lough Glas and the initial ascent are clearly trodden, but the upper ridge becomes a network of faint tracks across loose sandstone and heather.

Weather changes rapidly at this altitude. Summer months (May to September) typically offer the most stable conditions, though afternoon cloud build-up is common. Winter brings strong winds, ice on the ridge, and reduced visibility. Always check a reliable mountain forecast before setting out and pack waterproof layers, sturdy hiking boots, and extra food.

Guided Options & Facilities

There are no formal facilities on the mountain itself. Water sources are limited to streams and lakes along the Gap; treat or filter any water before drinking. Kate Kearney’s Cottage at the trailhead provides a café, hot drinks, light meals, and public toilets – a practical base for pre-hike preparation or post-ascent recovery.

For those who prefer professional guidance, Roam Wild operates a 5–7 hour guided hike priced at €70 per person (minimum two participants). The tour covers the Gap of Dunloe ascent, summit ridge, and return descent, with commentary on local geology and natural history. Dogs are not permitted on guided walks due to terrain and livestock access restrictions. Bookings can be arranged via 087 605 1642 or roamwild.ire@gmail.com.

Getting There

From Killarney, take the N72 west toward Killorglin. At the Beaufort junction, turn left and follow signs for the Gap of Dunloe. The road leads directly to Kate Kearney’s Cottage, where a small car park accommodates roughly ten vehicles. Arriving before 9 am is recommended during peak season to secure a spot and avoid congestion from jaunting-cars and cyclists.

Nearby Highlights

Lakes of Killarney – Scenic boat trips and lakeside trails are a short drive from the trailhead.
Gap of Dunloe Scenic Road – A historic glacial valley drive featuring narrow bridges, waterfalls, and traditional horse-drawn jaunting-cars.
Muckross House & Gardens – A 19th-century estate and mountain garden within the national park, ideal for a cultural visit after your hike.
Black Valley – A remote, dramatic valley to the south, popular with mountain bikers and photographers seeking untouched Kerry scenery.

Start your ascent before mid-morning to secure parking at Kate Kearney’s Cottage and to beat the midday jaunting-car traffic that fills the Gap of Dunloe road.