Colne Valley is a 5.1 hectare Local Nature Reserve north and east of Earls Colne in Essex.

It is owned and managed by Colchester Borough Council.

[1][2] The site is a linear strip along the route of the former Colne Valley and Halstead Railway, which has been converted to wildflower meadows.

There are otters, bats, stag beetles and birds.

[1][2] There is access from Colne Park Road in White Colne, which crosses the site.