Aldenham Country Park is a 175-acre (0.71 km2) parkland and woodland, including a 65-acre (260,000 m2) reservoir, created in 1971 and now part of the Watling Chase Community Forest, located near Elstree, Hertfordshire in England.
It offers community activities such as walking, playgrounds, fishing, sailing, and features a Disney-backed Winnie-the-Pooh theme area. Since 1984 it has been an important centre for breeding rare livestock (one of seventeen Rare Breeds Survival Trust centres in the U.K.), including Aldenham Longhorn Cattle, Bagot goats, Berkshire and Tamworth pigs, Norfolk Horn and English Leicester sheep.