Between Bushey and Elstree, near Radlett, Hertfordshire
Hilfield Park Reservoir
Reservoir
Place photograph
5.0
Wildland
Under 1 hour
Time
Free entry stated by the Trust
Cost
Peaceful
Feel
Why it's Wildland
5.0A 76-hectare reservoir and marshland refuge for waterbirds, including wintering ducks and the uncommon Black-necked Grebe. The reserve is managed for wildlife, but most of it is accessible only by arrangement; the east-side viewing platform offers a limited public-facing glimpse.
Hilfield Park stands out for its substantial reservoir and marsh margins, which support nationally important seasonal bird populations and a range of wetland plants. Access is restricted, so it is best approached as a carefully planned birdwatching stop rather than an open reservoir walk.
Peaceful
Find your way
Open mapBetween Bushey and Elstree, near Radlett, Hertfordshire
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The experience
The most defensible visit is a short birdwatching stop at the east-side viewing platform, reached via Hogg Lane and a public footpath. The reserve itself requires arranged access and is currently reported as temporarily unavailable even to members. Do not enter the reserve or use its car park without confirming permission.
Things to do
Birdwatch from the east-side viewing platform
The Trust identifies a viewing platform on the east side, reached via Hogg Lane and a public footpath. Keep to the path and check the current access notice before setting out.
Look for seasonal waterbirds
The Trust lists Black-necked Grebe among the reserve's waterfowl, with wintering ducks including Mallard, Shoveler, Teal, Wigeon and Goldeneye. These are wildlife possibilities, not guaranteed sightings.
Notice the marsh-margin vegetation
The reservoir margins include marshy areas with plants such as Great Reedmace, Reed Canary Grass, Common Reed and sedges. Observe from permitted paths or viewpoints.
Make a day of it
Quick escape · Check before visiting
Check the east-side viewing platform
- 01
Check the Trust's current access notice before travelling; the reserve is not open to the public and member access is temporarily unavailable.
- 02
If visiting, use the public footpath via Hogg Lane to reach the east-side viewing platform, and remain on the path.
- 03
Watch the reservoir and marsh margins for waterfowl; sightings vary by season.
When to go
April · May · June · July · November · December · January · February · No specific time of day is given by the source; check access arrangements before travelling.
The Trust recommends April to July and November to February, corresponding to spring and summer bird activity and wintering waterfowl.
The Trust advises wearing wellies in the muddy season. Tracks within the reserve may be heavily rutted; access conditions should be checked before visiting.
Worth pairing with
Old Park Wood
A nearby Herts and Middlesex Wildlife Trust nature reserve, listed as one mile away. Check its own access information before combining it with a visit.
What to look for
From the permitted viewing point, look for waterfowl on the reservoir and marsh plants around its margins. The Trust names Black-necked Grebe, wintering ducks, Common Tern, Reed Bunting and Sedge Warbler among the site's wildlife. Sightings are seasonal and not guaranteed.
Best time to go
April–July and November–February
The Trust highlights April to July and November to February. Spring and summer bring birds including Black-necked Grebe, Reed Bunting and Sedge Warbler; autumn and winter are noted for ducks including Goldeneye, Goosander, Pochard, Smew and Wigeon. Check access arrangements before travelling.
How long to spend
Under 1 hour
Perfect for
Birdwatchers · wildlife lovers
Before you go
Address
Google rating
Practical information
Opening & access
The reserve itself is not open to the public. Herts and Middlesex Wildlife Trust members may request access by arranging a short-term key loan, but the Trust currently reports that member access is temporarily unavailable. A viewing platform on the east side is accessible via Hogg Lane and a public footpath; keep to the path and check current arrangements before setting out.
Check before visiting
Parking
Reserve access is by arrangement only. The Trust says to use the Affinity Water car park and lock the gate behind you when accessing the reserve with an authorised key; check current access status and parking arrangements before travelling.
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Toilets
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Food & drink
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Dogs
No dogs permitted on the reserve.
Accessibility
The Trust warns that tracks within the reserve may be heavily rutted and that steps to the top of the dam are steep. The east-side viewing platform is reached via a public footpath; accessible-route details are not provided. Check before visiting.
Check before visiting
Cost
Free entry stated by the Trust; access to the reserve is by arrangement, and member access is temporarily unavailable.
Water
Reservoir; marshy margins
Gallery
Place photographsKeep exploring
Around Hilfield Park Reservoir
Within 50 km · approximate straight-line distances
