The River Lark is a river in England. It is a tributary of the River Great Ouse. Rising south of Bury St Edmunds in Suffolk, it flows through that town, Mildenhall and Prickwillow, and joins the Great Ouse south of Littleport in Cambridgeshire. It is about 50km long. The Environment Agency has designated the sections from Sicklesmere to Bury St Edmunds, and from Fornham St Martin to Isleham as Flood Warning Areas. The River Lark is also an important focus for Prehistoric activity, particularly relating to the Neolithic enclosure at Fornham All Saints. The river also runs through Culford School, and plays an integral part in school life, used for activities such lakeing/punting and rowing
There is a second, much shorter, River Lark also in Suffolk - it flows into the River Deben at Martlesham.
