Biddenham Pit is a gravel pit and Site of Special Scientific Interest[1] (SSSI), 0.41 hectares in size located in Biddenham, Bedfordshire.

[2] The pit was notified to Bedford Borough Council and Bedfordshire County Council under the Wildlife and Countryside Act (1981) in 1988,[2] and is also a Geological Conservation Review site.

[4] The pit provides an intact and visually inspectable terrace gravel, both silty and clayey, which has been laid down by the River Great Ouse.

[2] Several features of scientific interest have been identified in the deposits - interglacial mollusca and mammalian remains have been found, possible microfossil material as well as evidence of a prolific Paleolithic industry in the lowest layers of the gravel.

[2] Its last official inspection by a Natural England staff member found the whole site[5] and more specifically the gravel feature inside it to be in a 'Favourable' condition.