Biddenham Pit is a gravel pit and Site of Special Scientific Interest (SSSI), 0.41 hectares in size located in Biddenham, Bedfordshire. The pit was notified to Bedford Borough Council and Bedfordshire County Council under the Wildlife and Countryside Act (1981) in 1988, and is also a Geological Conservation Review site. The site is owned by Persimmon Homes and Kier Homes, with management advice given by Natural England.