Knocking Hoe NNR is an area of chalk grassland at the north end of the Chilterns. The site is of exceptional importance in supporting large populations of a number of rare plants.
The site is 0.5km north of the B655 between Barton-le-Clay and Hitchin.
There is a car park on the B655 just south of the reserve.
Access to the site is via paths from the B655.
This site is managed by Natural England.