List of nature reserves in the London Borough of Barnet

The spread of suburban development into the countryside was halted by the designation of a statutory Green Belt around London after the Second World War, and almost one third of Barnet's area of 8,663 hectares (21,410 acres) is Green Belt.

[1] Most of Barnet lies over London Clay, which is poor for agriculture, and open land is mainly used for activities such as horse grazing, playing fields, parks and golf courses.

Features of the traditional agricultural landscape have survived, such as old hedgerows, ancient trees and areas of herb-rich grassland.

Watling Chase Community Forest[b] covers 72 square miles (190 km2), extending north and west from Totteridge into south Hertfordshire.

[18] According to a report of the Department for Environment, Food and Rural Affairs, 39% of Barnet's SINCs were "in positive conservation management" in 2009–10.