Edgware Way Grassland or Edgware Way Rough is a 6.7-hectare (17-acre) Site of Metropolitan Importance for Nature Conservation in Edgware in the London Borough of Barnet. It is traversed by Edgwarebury Brook and contains traces of a planned railway viaduct and embankment. This was part of a planned extension of the Northern line from Edgware to Bushey, which was cancelled when the introduction of the Green Belt after the Second World War led to the cancellation of the developments which the railway was to serve. Part of the site is the Environment Agency's Edgwarebury Park Flood Storage Area.