Run The Line Short Course 2025

Starting from the outskirts of Glencullen, a small village nestled in the Dublin Mountains, this loop trail covers approximately 12 km (7.5 miles) with an elevation gain of about 400 metres (1,300 feet). The trailhead is conveniently located near Johnnie Fox’s Pub, a well-known local landmark and one of Ireland’s highest pubs, making it easy to find whether arriving by car or public transport.Getting ThereFor those using public transport, Dublin Bus route 44B runs from Dundrum Luas stop to Glencullen, with a stop near Johnnie Fox’s Pub. If driving, parking is available at the pub or in designated lay-bys along the Glencullen Road (R116). The area is well-signposted, and HiiKER provides reliable navigation for the entire loop.Trail Experience and TerrainThe route begins with a gentle ascent through mixed woodland, where you’ll notice the scent of pine and the sound of songbirds. Early on, the trail skirts the edge of the Glencullen River, offering glimpses of mossy banks and, in spring, carpets of bluebells. After about 2 km (1.2 miles), the path opens up to heathland, with panoramic views across the Dublin and Wicklow Mountains. Heather and gorse dominate the landscape here, and in late summer, the hillsides glow purple and gold.Landmarks and Points of InterestAt roughly 4 km (2.5 miles), you’ll reach the summit of Two Rock Mountain, marked by the Fairy Castle, a Bronze Age passage tomb. This ancient cairn is a significant historical feature, and on clear days, the summit provides sweeping views over Dublin Bay and the Irish Sea. The area is also home to native red grouse and, occasionally, sika deer grazing on the slopes.Descending from the summit, the trail follows a stony path through open moorland before re-entering forested sections. Around the 8 km (5 mile) mark, you’ll pass close to the Ballyedmonduff Wedge Tomb, another prehistoric site dating back over 4,000 years. This megalithic structure is tucked away in a clearing and is a fascinating spot for a short rest.Wildlife and NatureThe Dublin Mountains are rich in wildlife. Keep an eye out for kestrels hovering above the heather, foxes darting through the undergrowth, and, if you’re lucky, the elusive pine marten. The changing habitats along the route—from riverbank to heath to woodland—support a diverse range of flora and fauna throughout the year.Trail Conditions and PreparationThe loop is rated medium difficulty, with some rocky and uneven sections, especially on the descent from Two Rock Mountain. Waterproof boots are recommended, as parts of the trail can be boggy after rain. Weather in the Dublin Mountains can change quickly, so pack layers and a waterproof jacket. There are no water sources along the route, so bring enough for the entire hike.Navigation is straightforward with HiiKER, which provides detailed mapping and waypoints for the entire loop. Mobile signal is generally good, but always download maps for offline use before setting out.This trail offers a rewarding mix of natural beauty, sweeping views, and ancient history, all within easy reach of Dublin city.