Great Blakenham Pit is a 2.2-hectare (5.4-acre) geological Site of Special Scientific Interest south of Great Blakenham in Suffolk.

[1][2] It is a Geological Conservation Review site.

[3] This is described by Natural England as a key site for Pleistocene studies.

It has a sequence of early and middle Pleistocene deposits, including from the ancient course of the River Thames through East Anglia and from the severe Anglian ice age.

[4] The site is private property with no public access.