Therfield Heath is a biological Site of Special Scientific Interest[1][2] and Local Nature Reserve[3][4] on the chalk escarpment just north of Therfield, Hertfordshire.

The site offers views towards the north, over the valley of the Cam as far as Cambridge.

The heath contains a long barrow, thought to be Neolithic, and several Bronze Age round barrows, all of which English Heritage classes as scheduled ancient monuments.

[5][6] The heath was reportedly favoured by King James I as a hunting ground.

Church Hill has many rare pasqueflowers, which flower in early spring.