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Denham Lock Wood

A designated Site of Special Scientific Interest (SSSI) supporting some of the finest examples of wet woodland in London.

Among the rivers, lakes and canals of the Colne Valley in west London is an area of rich habitat for birds, flowers and invertebrates.

The gentle Frays River meanders through Denham Lock Wood, with its wonderful wet woodland and fen, and the meadows of adjacent Frays Farm to the south, providing a rare wildlife haven for some of London’s most threatened species.


Species you can see at Denham Lock Wood

Birds: Great-spotted woodpecker, little egret, dunnock

Invertebrates: Red-headed cardinal beetle, banded demoiselle, Desmoulin’s whorl-snail, glow-worm

Mammals: Bank vole, wood mouse, pygmy shrew

Plants: Grey willowguelder rosepurple loosestrife, meadowsweetdog's mercury, marsh-marigold


History of Denham Lock Wood

London Wildlife Trust began managing Denham Lock Wood in 1990 under an agreement with Hillingdon Council, after gaining recognition for its importance to wildlife as part of Frays Valley Local Nature Reserve. It has remained open and free to roam for many years.


Facilities at Denham Lock Wood

There is a boardwalk through the reserve.


How to get to Denham Lock Wood

Walking access is via Grand Union Canal Towpath, Denham Country Park, Denham Quarry Trail or Uxbridge Golf Course, although the towpath is easiest. Over the lock gates the nearby stile gets you into Denham Lock Field, from where Fray Farm Meadows is accessible. At the northern end of the field a bridge over the river leads to the boardwalk into Denham Lock Wood. There is no access directly from the A40 road. The nearest station is Denham, a 25-minute walk from the canal lock via Denham Country Park.



Opening times for Denham Lock Wood

Open at all times.


Accessibility at Denham Lock Wood

Parking is usually available at Uxbridge Golf Course and Denham Country Park but wheelchair access is not practicable because of slopes on the golf course track and the canal crossing. Denham Lock Wood has shallow steps and there is a stile at the Denham Lock’s canal access. A boardwalk on the riverside of Denham Lock Wood and public footpath from the golf course to the canal are well surfaced. Elsewhere paths may be wet and rutted.


Status of Denham Lock Wood

Site of Special Scientific Interest, part of a Site of Metropolitan Importance for Nature Conservation, Local Nature Reserve, Metropolitan Green Belt


Get involved at Denham Lock Wood 


Nearby nature reserves

Frays Farm Meadows
0 miles - London Wildlife Trust
Uxbridge Alderglade
1 miles - Herts and Middlesex Wildlife Trust
Park Road Pond
1 miles - London Wildlife Trust

Nature reserve map

Reserve information

North Uxbridge
Greater London
Map reference
TQ 054 863
Great for...
Insect spotting
getting away from it all
Best time to visit
Apr - Oct
Get directions
Find out here
Public transport
Plan your journey
Opening Times
Open at all times
5.30 hectares
Site of Special Scientific Interest (SSSI)
Living Landscape schemes
Colne Valley Living Landscape
Contact the Trust for further information
Walking information
No wheelchair access
Available at Denham Country Park
Dogs must be on lead
Grazing animals
There are grazing animals in the adjacent Frays Farm Meadows
Reserve manager
Simon Hawkins
Tel: 020 3897 6153