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Stocker's Lake

A large lake in the Colne Valley with nationally important numbers of wintering birds, including spectacular goldeneye and smew.

Stocker’s Lake is a wildlife rich reserve all year round. It is bordered by the River Colne and the Grand Union Canal and within this wonderful setting forms part of the Colne Valley Regional Park. The ridges that were left behind after the gravel extraction that formed the lake have provided it with shallower areas and islands in some places- ideal for water birds and other wildlife to nest on away from disturbance. Some of these islands are heavily wooded and used by the breeding herons in late winter.



Stocker's Lake is owned by Affinity Water and managed by the Herts and Middlesex Wildlife Trust.


Affinity Biodiversity Project

Stocker’s Lake is one of the sites included in the Affinity Biodiversity Project. This is an exciting project funded by Affinity Water and delivered by HMWT, with a goal to improve three of Affinity Water’s best sites, for both people and wildlife. These sites are Stocker’s Lake, Hilfield Park Reservoir and Springwell Reedbed. The project is using a range of approaches to reach out to people and encourage exploration and involvement in these wildlife havens, including regular nature-seeking events, volunteer opportunities, improved on-site interpretation and infrastructure, to allow the public to discover more about their wild and wonderful surroundings. Engagement with schools and local groups will also enable us to share our enthusiasm and knowledge for the nature at these reserves.


Watch this space…

At Stocker’s Lake we have big plans to improve the habitats even further for nature, whilst at the same time improving the experience for the public. Over the next three years you will notice changes around the reserve whilst we improve various areas. 



Get involved

If you are interested in volunteering at this site please click here to see if there are any volunteering opportunities coming up in the future.


Download Stocker's Lake leaflet


Visit our Feel Better Outdoors page to download a Healthy Walks Leaflet for Stockers Lake and other HMWT reserves.

Nearby nature reserves

Springwell Reedbed
1 miles - Herts and Middlesex Wildlife Trust
Old Park Wood
1 miles - Herts and Middlesex Wildlife Trust
Broadwater Lake
3 miles - Herts and Middlesex Wildlife Trust

Nature reserve map

Reserve information

Rickmansworth Aquadrome
Map reference
TQ 049 939
Great for...
a family day out
overwintering birds
stunning views
Best time to visit
Apr - Jul
Nov - Feb
Get directions
Find out here
Public transport
Plan your journey
Opening Times
Open at all times. Cafe at nearby Bury Lake.
40.40 hectares
Living Landscape schemes
Colne Valley Living Landscape
Access to the reserve is open at all times. Paths are prone to flooding in wet weather. There is a kissing gate.
Walking information
Walking shoes recommended. Closeby: Chess Valley Walk; Ebury Way; Grand Union Canal towpath
Park in Aquadrome car park nearby. Walk left past cafe to reserve entrance.
Dogs allowed
Reserve manager
Herts and Middlesex Wildlife Trust
Tel: 01727 858901


Factsheets and guides for your visit