Overview
Horses’ Glen (Irish: Gleann na gCappel) lies on the western flank of the Mangerton massif, a short drive from Killarney on the N71 Muckross Road. The valley is a classic example of a glaciated “dog‑leg” trough, its floor punctuated by three tarns – Lough Garragarry, Lough Erhogh and Lough Managh – and its sides capped by sheer cliffs of red sandstone and rhyolite. From the road the glen is visible as a dramatic V‑shaped scar, but the true experience comes from walking its length, where the landscape tells a story that stretches back 400 million years.
History & Geology
The rocks beneath Horses’ Glen began as desert sands in the ancient super‑continent of Pangaea. Over eons these sands compacted into the vivid red sandstone that dominates the lower slopes. Around 400 million years ago tectonic forces folded the sandstone into the Armorican Fold Mountains of Munster, and later volcanic eruptions injected bright rhyolite veins into the region. The final sculpting hand belonged to the last Ice Age: massive glaciers carved the V‑shaped valley, left behind moraines that dammed Lough Garragarry, and scoured deep basins that now hold Lough Erhogh and Lough Managh.
What to See & Do
Lakes and Views
- Lough Garragarry – the first lake encountered after leaving the concrete bridge. Its clear waters reflect the surrounding cliffs and provide a natural stepping‑stone crossing when water levels are low.
- Lough Erhogh – perched higher in the upper glen, this tarn sits in a basin cut by the retreating ice. A short pause on the ridge between Garragarry and Erhogh offers a panoramic view of the three lakes and the jagged cliffs that frame them.
- Lough Managh – the valley floor widens here, and the lake mirrors the sky, making it an ideal spot for quiet contemplation.
Peaks and Corridors
- Stoompa (705 m) – a gentle ascent from the glen’s rim leads to this summit, where the view sweeps across Lough Garragarry to Lough Leane and beyond to the MacGillycuddy’s Reeks.
- Devil’s Punchbowl – a dramatic corrie lake on the opposite side of the ridge, reachable via a steep, stepped descent that adds a touch of drama to the circuit.
- Mangerton North (782 m) – the highest point on the loop, offering a sweeping vista of the entire glen and the distant Kenmare Bay on a clear day.
Walking Routes
| Route | Distance | Ascent | Estimated Time | Difficulty |
|---|---|---|---|---|
| Short Loop | 8 km | 700 m | 4–5 hours | Hard – full equipment essential |
| Full Circuit | 14 km | 850 m | 5–6 hours | Moderate – compass, map and rain gear essential |
Both routes start and finish at the concrete bridge on the Finnoulagh River (grid reference 984 847). The short loop follows the Mangerton track for about a kilometre to the 350 m contour, then drops into the glen via the old fisherman’s path, skirts the lakes, and climbs the steep slope behind the glen to re‑join the main track.
The full circuit adds the ridge walk to Stoompa, a detour over the Devil’s Punchbowl, and a return via the heathery spur that links back to the original outward track. Along the way you will cross narrow streams on stepping stones, negotiate a small moraine‑blocked outflow at Lough Garragarry, and enjoy several rock‑step assisted descents.
Practical Information
Getting there – From Killarney, take the N71 Muckross Road, turn left at the Muckross Park Hotel, then take the first right. A small lay‑by by the concrete bridge provides the only formal parking; the remainder of parking is roadside, so arrive early in the high season to secure a spot.
Public transport – The nearest bus stop is in Killarney; there is no direct public service to the glen, so a car or taxi is the most reliable option.
Navigation – The glen is marked on Ordnance Survey Discovery Series maps (Sheets 78 and 79). The start/finish point is clearly indicated, and the route is sign‑posted in places, but the terrain can be confusing, especially in poor visibility. A compass, map and, in winter, appropriate rain gear are strongly recommended.
Equipment – The short loop is classified as “hard”; sturdy boots, trekking poles and a waterproof jacket are advisable. The full circuit is “moderate” but still involves steep sections, rock steps and occasional water crossings, so bring sturdy footwear and be prepared for uneven ground.
Facilities – There are no facilities within the glen itself. Food, drink and accommodation are plentiful in Killarney, ranging from hostels to fine‑dining restaurants. After a day of walking, many visitors head back to the town for a well‑earned pint and a hearty meal.
Seasonality – The route is accessible year‑round, but winter conditions can make the stream crossings more challenging and the higher sections icy. When snow lies on the hills, the circuit becomes a superb winter walk, offering crisp air and striking contrasts between white‑capped peaks and dark volcanic rock.
Safety – The glen’s steep sides can produce sudden gusts, and the narrow paths along the cliffs have no railings. Stay on the marked track, especially near the edge of the “V” shape, and keep an eye on weather updates if you are planning a longer trek.
Including Horses’ Glen in a Ring of Kerry itinerary
The Ring of Kerry drive follows the N71 and N70 around the Iveragh Peninsula. Although Horses’ Glen is not on the main Ring route, it lies just off the N71 a few kilometres east of Killarney, making it an easy detour for walkers who want to add a glacial‑valley experience to their scenic drive. After visiting the classic Ring highlights such as Ross Castle, Muckross Abbey and Moll’s Gap, a short side‑trip north‑west from the N71 brings you to the glen’s lay‑by. The extra drive adds roughly 15 minutes each way, but rewards you with a quieter, less‑touristed landscape and the chance to stretch your legs on a rewarding hike.
Seasonal tips & visitor advice
- Best time to visit – Late spring to early autumn (May‑September) offers the driest paths and full lake levels, ideal for photography and wildlife spotting. Early summer brings abundant wildflowers on the surrounding slopes.
- Winter walking – The glen remains open, but icy stream crossings and snow‑covered ridges demand crampons or micro‑spikes and warm, layered clothing.
- Dog‑friendly – Dogs are permitted on the trails but must be kept under control, especially near the steep cliff edges and water crossings.
- Family suitability – The terrain is steep and includes rock steps; it is best suited to older children and confident walkers. Younger families may prefer the short loop with a reduced distance.
- Photography – The V‑shaped scar, the three crystal‑clear tarns and the red‑sandstone cliffs provide striking compositions, particularly at sunrise when the light catches the rhyolite veins.
For a deeper dive into the geological narrative and personal reflections on the walk, see the Irish Times feature by Tony Doherty: Take a walk through one of the most beautiful glens in Kerry.
Horses’ Glen offers a rare combination of dramatic geology, tranquil lake scenery and challenging mountain walking, all within a short drive of Killarney’s hospitality. Whether you choose the concise 8 km loop or the expansive 14 km circuit, the valley rewards every step with a palpable sense of ancient forces and breathtaking Irish wilderness.