Noar Hill, near Selborne in East Hampshire, is best known for its nature reserve.
Nore is an obsolete spelling of nor, north. Noar is a variant of nore.
The hill is at 51°04′30″N 0°56′00″W / 51.07500°N 0.93333°W (Ordnance Survey reference SU745315) and lies in the parish of Newton Valence, in the East Hampshire Area of Outstanding Natural Beauty..
It forms one of the westerly outposts of the chalk hills called the South Downs, and rises to a maximum height of about 210 metres above sea-level. The western and northern flanks slope fairly gently, but the eastern and southern flanks in places reach a gradient exceeding 60%.
Gilbert White, in his Natural History of Selborne, says of Noar Hill:
At each end of the village [Selborne], which runs from south-east to north-west, arises a small rivulet: that at the north-west end frequently fails: but the other is a fine perennial spring little influenced by drought or wet seasons, called Well-head. This breaks out of some high grounds adjoining to Nore Hill, a noble chalk promontory, remarkable for sending forth two streams into two different seas. The one to the south becomes a branch of the Arun, running to Arundel, and so falling into the British channel: the other to the north.
The western flanks and much of the summit are given over to arable fields. A smaller part of the summit, 20 hectares (about 49 acres) known as High Common, is covered with downland grasses and scrub. The northern, eastern and southern flanks are covered by deciduous woodland dominated by beech. Such beechwoods on steep hills in East Hampshire are termed "hangers".