Harlestone Heath is a 2.6-hectare (6.4-acre) nature reserve north-west of Northampton in Northamptonshire.

It is managed by the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire.

[1] The site is two narrow strips on either side of the Northampton loop railway line between Northampton and Rugby, with a tunnel connecting the strips.

Birds include green woodpeckers and siskins, and there are butterflies such as brown arguses and speckled woods.

[1] There is access by footpaths from Harlestone Road through the Firs conifer plantation.