Quarry Hangers is a 28.5-hectare (70-acre) biological Site of Special Scientific Interest south-west of Caterham in Surrey. An area of 11 hectares (27 acres) is a nature reserve managed by the Surrey Wildlife Trust.

This sloping site on the North Downs has species-rich chalk grassland, woodland and scrub. Heavily grazed areas are dominated by red fescue and sheep’s fescue, with flowering plants including horseshoe vetch, bird’s-foot trefoil and wild thyme. There is a taller sward in less grazed areas, with grasses such as upright brome and wood false-brome.

51°16′01″N 0°06′43″W / 51.267°N 0.112°W / 51.267; -0.112