Sarratt Bottom nature Reserve in Hertfordshire is a 3.2-hectare (7.9-acre) biological Site of Special Scientific Interest.

The main plants in grassland areas include sweet vernal grass and meadow foxtail, and marsh horsetail and common spike-rush are common in damper areas.

The site has hedgehogs and a wide variety of wetland birds and invertebrates.

[1] There is no public access but the site can be viewed from Moor Lane.

The local planning authority is Three Rivers District Council.