Back to reserve map

Hilfield Park Reservoir

This large expanse of water is a valuable refuge for waterfowl.

An important refuge for large numbers of wintering ducks, particularly mallard, shoveller, teal, wigeon, pochard, tufted duck and goldeneye. The area is of national importance for its summer populations of moulting pochard, tufted duck and common tern. The marginal vegetation supports many breeding bird species. Around the margins of the reservoir are large marshy areas where many species of marsh plants flourish, including reedmace, reed canary grass and various sedges.


PLEASE NOTE  this site is not owned by the Trust and a key is required to access it. Members of the Trusts can collect a key from the Trust's head office in St Albans. A refundable £10 deposit is required. Please contact the Trust on 01727 858901 or via  



Hilfield Park Reservoir is owned by Affinity Water and managed by the Herts and Middlesex Wildlife Trust.


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.


Nearby nature reserves

Cassiobury Park LNR
4 miles - Herts and Middlesex Wildlife Trust
Totteridge Fields
4 miles - London Wildlife Trust
Broad Colney Lakes
5 miles - Herts and Middlesex Wildlife Trust

Nature reserve map

Reserve information

On the A41 towards Barnet
Between Bushey and Elstree
WD25 8DA
Map reference
TQ 152 959
Great for...
spring migrant birds
Best time to visit
Apr - Jul
Nov - Feb
Get directions
Find out here
Public transport
Plan your journey
Opening Times
Open at all times
76.30 hectares
Key required

This reserve can only be accessed through a permit.
Walking information
Large flight of steps on reservoir wall. Take care as deep water. Stout shoes required Close to Aldenham Country Park and LOOP Walk (section 15)
Park in the water company car park and ensure the gate is locked behind you.
Dogs allowed
Reserve manager
Herts & Middlesex Wildlife Trust
Tel: 01727 858901