Dollis Brook runs through the London Borough of Barnet in north London. It is a tributary of the River Brent, which is itself a tributary of the River Thames. The Dollis Valley Greenwalk follows almost all of Dollis Brook, apart from a short section at the beginning which passes through private land, and the London Loop follows it as far as Barnet Lane. The name Dollis is probably derived from the Middle English word 'dole', meaning the shares of land in the common field.
The London Borough of Barnet, located on the northern periphery of London and having much of the area within its boundaries in the Metropolitan Green Belt, has many parks and open spaces. In addition there are large areas taken over by cemeteries and golf courses, and part of Hampstead Heath.
Folly Brook is a 2+1⁄4-mile (3.6 km) long brook in the London Borough of Barnet. It is a tributary of Dollis Brook, which is a tributary of the River Brent, which is a tributary of the River Thames. Folly Brook is lined for most of its length by narrow strips of woodland and scrub, with a good variety of trees and shrubs. It is one of the best streams in Barnet for small aquatic invertebrates, including several species of caddis fly and a stonefly, which are only found in unpolluted waters.
Edgwarebury Park is a 22-hectare park in Edgware in the London Borough of Barnet. It was once part of the manor of Earlsbury, which was first mentioned in 1216. In the later Middle Ages it was owned by All Souls College, Oxford, and there is still evidence of the older landscape of fields and woodland. Hendon Rural District and Middlesex County Council bought the land in two parts in 1929 and 1932, and the park opened in the latter year. It is now owned and managed by Barnet Council.
Hendon Park is a 12 hectare London suburban park situated 7 miles (11 km) north west of Charing Cross. It borders the Northern line, and Hendon Park and Northern line Railway Cutting are a Site of Local Importance for Nature Conservation.
The Silk Stream is a brook just over 4 kilometres (2.5 mi) long in the London Borough of Barnet. It is one of the major components of the Blue Ribbon Network.
Woodridge Nature Reserve or Woodridge School Nature Reserve is a 0.7-hectare (1.7-acre) Site of Local Importance for Nature Conservation in Woodside Park, London, owned and managed by the London Borough of Barnet. It was designed as a nature trail for local primary schools, but is now very neglected.
Hadley Green is a 10-hectare (25-acre) Site of Metropolitan Importance for Nature Conservation in Hadley in the London Borough of Barnet. The reserve straddles the Great North Road between Hadley Green Road and Fold Lane.
Scratchwood is an extensive, mainly wooded, country park in Mill Hill in the London Borough of Barnet. The 57-hectare site is a Site of Metropolitan Importance for Nature Conservation and together with the neighbouring Moat Mount Open Space. It is a Local Nature Reserve.
Oak Hill Wood is a 10-hectare Local Nature Reserve (LNR) and a Site of Borough Importance for Nature Conservation Grade I, in East Barnet, London. It is owned by the London Borough of Barnet, and part of it is a 5.5-hectare nature reserve managed by the London Wildlife Trust.
Copthall Railway Walk and Copthall Old Common is a 9-hectare (22-acre) Site of Borough Importance for Nature Conservation, Grade II, in Mill Hill in the London Borough of Barnet.
Totteridge Green is a five hectare Site of Borough Importance for Nature Conservation, Grade II, in Totteridge in the London Borough of Barnet. It is also registered common land.
Stoneyfields Park is a three-hectare public park in The Hale in the London Borough of Barnet.
Deans Brook is a two-kilometre-long stream which runs between Mill Hill and Edgware in the London Borough of Barnet. It is a tributary of the Silk Stream, which is a tributary of the River Brent, which is a tributary of the River Thames.
Mill Hill Old Railway Nature Reserve is a 2.3-hectare (5.7-acre) Site of Borough Importance for Nature Conservation, Grade II, in Mill Hill in the London Borough of Barnet.
Clarefield Park is a small park and Site of Local Importance for Nature Conservation in Brent Cross in the London Borough of Barnet.
Clitterhouse Recreation Ground or Clitterhouse Playing Fields is a park and Site of Local Importance for Nature Conservation in Brent Cross in the London Borough of Barnet. It is a large area of mown grass with a children's playground, bordered by thick hedges. Clitterhouse Stream, a tributary of the River Brent, runs along its eastern border.
Clay Lane is a one kilometre long public footpath and bridle way in Edgware in the London Borough of Barnet. It is a Site of Local Importance for Nature Conservation.
Edgwarebury Brook is a small stream in Edgware in the London Borough of Barnet. It is a tributary of Deans Brook, which is a tributary of the Silk Stream, which is a tributary of the River Brent, which is a tributary of the River Thames.
