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.
Moat Mount Open Space is a 110-hectare park and nature reserve in Mill Hill in the London Borough of Barnet. It is part of Moat Mount Open Space and Mote End Farm Site of Borough Importance for Nature Conservation, Grade II, which includes Barnet Gate Wood and Scratchwood Countryside Park, but is separate from Scratchwood itself, which is a neighbouring park and nature reserve. Most of the site is open to the public, but Mote End Farm and some other areas are private. Scratchwood and Moat Mount are a Local Nature Reserve.
Darland's Lake Nature Reserve is a nature reserve south of Totteridge Village in Barnet, England. It is owned by the London Borough of Barnet and was managed from 1971 by the Hertfordshire and Middlesex Wildlife Trust, and more recently by the borough council. In 2007 the council spent £215,000 on repairing the dam and other works, and then proposed leasing the reserve to the Wildlife Trust. The transfer did not take place and in September 2017 a trust was set up by the London Wildlife Trust and local residents associations which took over the management of Darland's Lake. In 2020 Darlands Conservation Trust launched an appeal to raise £450,000 for excavation to prevent the lake drying up.
Barnet Gate Wood is a public open space in Barnet Gate, Barnet, London. It is owned and managed by the London Borough of Barnet, and is part of the Watling Chase Community Forest.
Rowley Green Common is a six hectare Local Nature Reserve and a Site of Importance Metropolitan for Nature Conservation in Arkley, north London. It is owned by the London Borough of Barnet. It is also registered common land.
Burtonhole Lane and Pasture is a 6.5-hectare (16-acre) Site of Borough Importance for Nature Conservation, Grade II, between Mill Hill and Totteridge in the London Borough of Barnet. It consists of Burtonhole Lane between Partingdale Lane and Burtonhole Close, a footpath east from Burtonhole Lane towards Folly Brook, two fields south of the footpath, and a narrow belt of privately owned woodland north of the footpath. Burtonhole Brook, a tributary of Folly Brook, crosses Burtonhole Lane and the fields.
Glebelands is Site of Borough Importance for Nature Conservation, Grade I, in Colney Hatch in the London Borough of Barnet. It is also part of the Coppett's Wood and Glebelands Local Nature Reserve.
Rowley Lodge Field is a Site of Borough Importance for Nature Conservation, Grade II, in Arkley in the London Borough of Barnet.
Arkley South Fields are a Site of Borough Importance for Nature Conservation, Grade II, in Arkley in the London Borough of Barnet. It is an extensive area of set-aside agricultural fields with hedgerows and ditches. It is not of great botanical interest, and its conservation value lies in its breeding birds, especially skylarks, a declining species which is a priority under the UK Biodiversity Action Plan. It also supports breeding meadow pipits, kestrels, reed buntings, whitethroats, willow warblers and green woodpeckers.
Arkley Lane and Pastures is a 50-hectare Site of Borough Importance for Nature Conservation, Grade II, in Arkley in the London Borough of Barnet. Arkley Lane, off Barnet Road, is an old drovers' road. Located on the Barnet Plateau, it is now a quiet country lane with a traditional bank and ditch. The thick hedges are composed of beech and hornbeam, ash, field maple and magnificent old pedunculate oaks.
Ashley Lane is a one hectare Site of Borough Importance for Nature Conservation, Grade II, in Hendon in the London Borough of Barnet. It is over 400 years old, and was an important medieval road. Cardinal Wolsey travelled along it on his final journey to York in 1530. It is now a bridleway which runs between Hendon Golf Course and Hendon Cemetery.
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.
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.
Greenhill Gardens is a 1.6 hectare public park in New Barnet in the London Borough of Barnet. Its main feature is an ornamental lake with a wooded island, which attracts many birds, and it also has a grassed area with scattered mature trees. It is a site of local importance for nature conservation.
Old Court House Recreation Ground is a public park in High Barnet in the London Borough of Barnet. It is one of the borough's Premier Parks and received a Green Flag Award for 2009–2010.
Swan Lane Open Space is a public park in Whetstone in the London Borough of Barnet. It is the smallest of Barnet's sixteen 'Premier Parks'. It has a children's playground, a café, and a pond which was formerly used for model boating but is now covered with reeds and water plants. Much of it is mown grass and trees, including giant redwoods and a Cedar of Lebanon, but it also has more natural areas managed for nature conservation.
Brent Park is a small public park of 2.24 hectares in Hendon in the London Borough of Barnet. It is part of the 'Lower Dollis Brook' Site of Borough Importance for Nature Conservation, Grade II.
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 tributary of the River Thames.
