Snakeholme Pit, originally known as Stanfield Pit, is a 0.8-hectare (2 acres) nature reserve near Langworth, Lincolnshire, managed and owned by Butterfly Conservation. Clay from the former pit was used by Anglian Water to build up river banks. When no longer required for that purpose, Anglian Water flooded the pit and used it as a fish nursery.^[1][2]

Anglian Water agreed to a proposal put to them by the Lincolnshire branch of Butterfly Conservation to convert the site into a nature reserve, which was opened by Sir Peter Scott in 1987. The Environment Agency took responsibility for the site in 1996, and handed it over to Butterfly Conservation in 2013. What remains of the pond covers about one-third of the site.^[2]

The pond supports a variety of species of dragonfly and damselfly, as well as aquatic molluscs. Part of the site is surrounded by large hedgerows with mature ash (Fraxinus excelsior) and oak trees (Quercus robur).^[1] The Lincolnshire Conservation Group make annual visits to rake up the cut hay in the meadow areas every summer once the wildflower seeds have dispersed, to help improve the flower-rich meadow.^[3]