Gunton Park Lake is a 18.3-hectare (45-acre) biological Site of Special Scientific Interest by Gunton Hall, north-west of North Walsham in Norfolk, England.

[1][2] It was formed by damming Hagon Beck.

This artificial lake has the largest flock of post-breeding gadwall in Britain, and more than 500 birds have sometimes been recorded in September.

Wintering wildfowl include teal, mallard, shoveler, shelduck and goosander.

[3] The site is private land with no public access.