Portsdown Hill is the boundary between the city of Portsmouth and Hampshire’s rolling countryside to the north. Much of the hill is designated as a Site of Special Scientific Interest (SSSI) due to its wildlife-rich chalk grassland. A variety of woodland and scrub habitats can also be explored via a network of paths.
Most of the SSSI is between 50 to 100 metres high, with the highest part of the hill reaching 120 metres. It is an excellent vantage point both north and south, with spectacular views across the Solent to the Isle of Wight.