Aghla More
Aghla More is a prominent mountain in County Donegal in the northwest of the Republic of Ireland, rising to approximately 584 metres above sea level. It is part of the Derryveagh Mountains, a rugged and largely wild range that characterises much of inland Donegal. The mountain's name derives from the Irish "Eachla Mór," meaning "the great horse pasture" or sometimes interpreted as "great horse field," a reference to the terrain's ancient use by communities who grazed animals on upland areas. It is a relatively well-regarded summit among Irish hillwalkers, appreciated for both the physical challenge it offers and the extraordinary panoramic views from its top, which on a clear day extend across a vast sweep of Donegal's sea lochs, mountains, and Atlantic coastline.
The broader Derryveagh range in which Aghla More sits has a deep and at times sorrowful human history. The surrounding glens and boglands were once more heavily populated, supporting farming communities who worked marginal land for generations. The Great Famine of the 1840s devastated this part of Ireland severely, and the subsequent decades of emigration left many valleys sparsely inhabited. The nearby Poisoned Glen, just to the south of the range, carries its own dark legend: one tradition holds that the poisonous Irish spurge plant once grew there, tainting the water, while another more dramatic account ties the name to the death of the mythological Fomorian king Balor, whose eye was said to have poisoned the valley when it was put out. These layers of folklore give the landscape an atmosphere that feels ancient and storied beneath its wild surface.
Physically, Aghla More presents a characteristically Donegalian face: a broad, rounded summit rising above sweeping flanks of deep blanket bog, heather, and quartzite-flecked rock. The ground underfoot is often wet and spongy, and walkers will frequently find themselves picking a careful route through tussock grass and peat hags, especially after rain. The mountain is composed largely of Precambrian quartzite and metamorphic rocks, giving the upper slopes a pale, stony appearance where the heather and grass give way to bare ground near the top. The silence up here is broken primarily by wind, the occasional call of a raven or peregrine falcon, and in spring the haunting bubbling call of the curlew rising from the lower bogs.
The landscape surrounding Aghla More is breathtaking in scope. To the northwest lies the broad finger of Lough Nacung and Lough Dunlewy, with the iconic cone of Errigal — Donegal's highest peak and one of Ireland's most distinctive mountains — rising sharply just a few kilometres away. The Poisoned Glen lies in a dramatic hollow beneath the cliffs of Slieve Snaght to the south, and the wide boggy expanse of the Derryveagh uplands stretches out in nearly every direction. The nearby village of Dunlewey (An Dún Léibhe), situated at the foot of Errigal and the glen, provides a base and has cultural significance as an Irish-speaking area in one of Donegal's Gaeltacht regions. The Dunlewey Centre there offers visitors an introduction to local heritage and the Irish language.
For walkers planning to ascend Aghla More, the most common approach is from the Dunlewey area, heading southeast toward the mountain across open moorland. There is no formal waymarked trail to the summit, so a good OS map (the Discovery Series Sheet 1 covers this area) and a compass or GPS device are advisable, particularly in poor visibility when cloud frequently settles on these summits. The mountain can be combined with its slightly lower neighbour Aghla Beg in a satisfying horseshoe circuit. Parking is typically found along the roadside near Dunlewey, and the walk to the summit takes roughly two to three hours return at a comfortable pace. Waterproof clothing and sturdy boots are essential year-round given the boggy terrain and the changeable Atlantic weather.
The best time to visit is generally between late spring and early autumn, when daylight is long and the heather blooms purple across the slopes in August and September. However, any season can offer its own reward — winter brings a stark, stripped-back beauty to the ridge, and snow occasionally dusts the upper quartzite slopes, making for dramatic photography. The area around Aghla More also falls within or close to Glenveagh National Park, Ireland's second-largest national park, which protects a vast swathe of this landscape and includes the gothic revival Glenveagh Castle on the shores of Lough Veagh to the southeast. Visiting the national park visitor centre can enrich any trip to this corner of Donegal considerably.
One of the quieter charms of Aghla More compared to its famous neighbour Errigal is the relative solitude a walker encounters here. While Errigal's trails can be busy on summer weekends, Aghla More sees far fewer visitors, meaning the mountain retains a genuine sense of remoteness and wilderness. The boglands at its base are important habitats for species including golden plover, red grouse, and various sphagnum mosses, and in the loughs below, salmon and trout have been fished for centuries. This is a place where the boundary between the cultivated and the elemental dissolves, where the weight of Irish history — famine, emigration, language, and myth — presses close against a landscape of extraordinary, windswept beauty.