Dumbleton Copse is a small area of mixed woodland at the northern end of Thornhill Estate that originally formed part of the larger Netley Common.

There is a network of informal paths through the woodland and an off-road cycle track which is well used by local children. The area is supported by ‘Love Thornhill’ volunteers.

Access is from Dumbleton Towers car park, Warburton Hill and Baxter Road.