Mill Park Reserve was established following a purchase by the Parish Council of an area of land adjacent to Willow Mill at the Murcott end of Long Buckby. Prior to this Daventry District Council had been using the land as a refuse tip. It had previously been used as a coal yard.
In the beginning the site only had a hedge on the Western side and a few shrubs and rough grass. Since becoming a pocket park trees, bushes and hedgerows have been planted. Old willows by the stream at the North-eastern edge of the park have been pollarded. Two ponds have been established as well as a bog garden, bird hide and stream-side observation platforms. Seats and picnic benches have been obtained and secured. The reserve contains a small butterfly garden, a human sun clock, a kingfisher bank, a wildflower meadow, and mini woodland comprised of trees commonly found in Northamptonshire. Broken crockery and glass can often be seen on the surface of the soil and remain signs of the site's former use.
There are regular sightings of kingfishers, slow worms, grass snakes, toads, frogs and smooth, palmate and great crested newts and a variety of bird life.
Working parties to manage the site take place once a month and most Thursday mornings and more often as jobs require and weather permits. Regular maintenance includes coppicing, removing excess elder, strimming, mowing footpaths, pruning, planting, and clearing the ponds and stream.
An educational field centre has recently been installed to provide shelter and wildlife resources and information for visitors. Current projects include increasing the wild flower meadow and the installation of information lecterns at various locations on the reserve.