Fairmile Bottom is a 70.2-hectare (173-acre) biological Site of Special Scientific Interest north-west of Arundel in West Sussex. An area of 61.3 hectares (151 acres) is also a Local Nature Reserve. This is an area of scrub and mature woodland with scattered species-rich chalk grassland. Yew is dominant over much of the woods but in some parts there is a high proportion of beech. According to Natural England there is an "outstanding diversity of beetles" and butterflies include the white admiral and the uncommon silver-washed fritillary.