Overview
Most people who come to Tomies never climb the mountain, and that is the right call. The draw is the Tomies Wood Loop, a marked 6 km circuit through ancient oak woodland to a waterfall and back along the shore of Lough Leane, well below the 735 m summit. It is graded easy to moderate, mostly on a clear gravel track, and it is a genuine escape from the crowds at the honeypot end of Killarney National Park. If you want the summit and the ridge, that is a hillwalk, not a stroll, and it is described further down.
The walk: Tomies Wood loop
From the car park the path runs through a canopy of mature oaks, many of them survivors of the woodland that once covered far more of this valley. About 1.5 km in you reach O’Sullivan’s Cascade, a tiered waterfall dropping into a clear pool; when it is in spate after rain, plenty of local walkers rate it above the more famous Torc. The track carries on past the falls, down to the lake, and follows the shore of Lough Leane before curving back through the trees. Most people take somewhere between an hour and a half and three hours, depending on how long they linger by the water.
Because the surface is largely gravel, the footing is reliable and you are unlikely to go wrong. The oaks hold a cooler, damper microclimate that you notice most in high summer, so a light layer is worth having even on a warm day.
Route options
Two detours reward the extra effort. At roughly the halfway point, a path threads through dense rhododendron and drops to the Lough Leane shore, where the stone ruins of Glena Cottage sit near Dinis on the water’s edge. For a much bigger day, a ridge line climbs from the woods towards the main Purple Mountain peak; that is a proper hillwalk on rough, exposed ground, and it wants boots, a map and settled weather rather than a casual afternoon.
History and name
Long before ‘Purple Mountain’ became the common English name in the 19th century, the whole massif was known as Tomies. The Irish scholar Paul Tempan traces the name to Tuamaidhe, meaning two burial cairns on the summit, and those cairns are still up there. The surrounding woods carry the older stories too, traditionally held to be summer hunting grounds of Fionn mac Cumhaill and the Fianna.
What to see along the trail
- Ancient oak woodland – sessile oak, holly and an understorey of heather and fern on the lower slopes, sheltering the wildlife below. Deer, red squirrels and pine martens all use these woods, and the birdlife runs to wrens, robins, chaffinches and blue tits.
- O’Sullivan’s Cascade – roughly halfway round, best after recent rain. Stand close and you will feel the spray, so bring a jacket if you want the full effect.
- Glena Cottage ruins – weathered stone walls down on the Lough Leane shore, reached by the rhododendron detour.
- The summit cairns – for those who press on up the ridge, uninterrupted views east over the Killarney lakes and west to the MacGillycuddy’s Reeks.
Practical information
- Distance and time – 6 km loop, 1.5 to 3 hours at an easy pace. The out-and-back to O’Sullivan’s Cascade alone is about 3 km return.
- Parking – a free car park with just 28 spaces at the trailhead, open 08:00 to 18:00. It fills fast in season and at weekends, so arrive early or you will be turning around.
- Dogs – dogs are fine on the wood loop but should be kept on a lead. Note that the higher Tomies and Purple Mountain loop is listed as no dogs, so if you are heading for the ridge, check before you set off.
- Accessibility – the main gravel loop suits most walkers and sturdy pushchairs, though it turns uneven near the cascade and the bridges. Wheelchair users will find the gradient and surface hard going.
- Facilities – none on the trail. Water and light refreshments are available seasonally at Kate Kearney’s Cottage. Pack snacks and layers; the shore can be windy.
- Best season – open year-round. Spring brings the rhododendron into flower, autumn turns the oaks gold, and in winter there can be ice near the waterfall.
Getting there
From Killarney, take the N72 towards Killorglin, then turn left onto the Gap Road (L4040). The Tomies Wood car park is signposted near the base of the Gap of Dunloe, close to Kate Kearney’s Cottage; note this is the N72, not the N71, which heads the other way towards Kenmare. Public transport into this part of the park is limited, so most people drive. The ActiveMe guide has downloadable GPX files and a route map if you prefer to navigate by phone.
Get there before 10am at the weekend. With only 28 spaces and a gate that shuts at 6pm, the car park is the real limit on this walk, not the walk itself.