Tewinbury Nature Reserve (c) Josh Kubale

Tewinbury Nature Reserve

Tewinbury Nature Reserve (c) Josh Kubale


A diverse reserve nestling in the Mimram Valley, where a fantastic two storey hide gives great views of the wildlife in clear, chalk stream waters.


Between Welwyn Garden City and Hertford, along the driveway to Tewin Bury Farm Hotel

OS Map Reference

TL 265 140
A static map of Tewinbury

Know before you go

4 hectares

Parking information

Please park in the HMWT car park at Tewin Bury Farm Hotel. If necessary open the gates and close them behind you.

Grazing animals

Longhorn cattle graze the meadow adjacent to the car park from time to time; also managed by the Trust


A paved path leads from car park to a hide which is accessible to wheelchairs.


On a lead


Bird hides

When to visit

Opening times

Open at all times

Best time to visit

April to July

About the reserve

This beautiful reserve contains a variety of habitats including wet meadow, tall fen and swamp, alder carr, willow scrub, willow pollards and chalk stream. The tall fen/swamp occurs around a lagoon and along adjacent channels, and has a mixture of common reed, reed sweet-grass and common reedmace. Water voles can be seen swimming in the reedbed channels. The surrounding banks support great horsetail, butterbur and moschatel, as well as greater and lesser pond sedges, monkey flower and golden saxifrage. Cetti’s warblers are breeding –
a testament to the successful ongoing management of the reserve.

Seasonal Highlights
 Kingfisher, little egret, water vole..
Summer: Cetti’s warblers, reed bunting, reed warbler, southern marsh orchid.
Autum /Winter: Green sandpiper, pied wagtail, siskin, snipe, water rail.


Site entrance:  You can access the reserve from the road entry to Tewin Bury Farm Hotel.

Access by road: From A1(M) junction 6 take A1000. Fourth exit next roundabout then first exit on two further roundabouts towards Digswell. Go one mile (B1000 Hertford Road), Tewin Bury Farm Hotel on left.

Access by public transport
388 – opposite Tewin Bury Farm Hotel (0.1 miles).
Rail: Welwyn North station (1.7 miles).

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Support our nature reserves

It costs on average £30 per month to care for each acre of our nature reserves.