The mountain was used as an active military base until the Good Friday Agreement in 1998, with remnants of the perimeter fence still visible.
The summit provides clear visibility across the Irish Sea to the Isle of Man and the Mull of Galloway on clear days.
The site acts as the source for several local rivers that flow into the River Lagan.
It is home to the rare Irish hare, which can often be spotted in the open moorland areas.
The landscape is formed by basaltic rock, a legacy of intense volcanic activity 60 million years ago.
Divis and the Black Mountain represents the highest point in the Belfast Hills at 478 meters above sea level. This 1,900-acre site is managed by the National Trust and features a mix of heathland, blanket bog, and grassland habitats. It sits on the edge of the Antrim Plateau, offering panoramic views across Belfast, the Mourne Mountains, and occasionally the coast of Scotland. The area contains historical archaeological features, including Bronze Age cairns and remnants of military usage from the 20th century. Visitors can access multiple trails, such as the three-mile Ridge Trail, which provides a circuit of the summit. The site is a designated Site of Special Scientific Interest due to its rare upland ecology. It functions as an important carbon store and watershed for the surrounding region.
The summit trig point looking back toward the Belfast skyline.
Bring layers, as the summit is consistently colder and windier than the city below.
Use the onsite toilets at the trailhead as there are no facilities once you head up the mountain.
Stick strictly to the marked paths to avoid damaging the protected peat bog and fragile moorland ecosystem.
Attempting the summit in low-visibility or heavy fog, as the terrain is featureless and easy to lose track of.
Wear sturdy waterproof hiking boots; keep dogs on a lead at all times to protect ground-nesting birds and livestock.
