Ragged-robin © David Kilbey

Ragged-robin © David Kilbey

Mapledurwell Fen and the Hatch Nature Reserve

A small fen teeming with rare plants


Greywell Road
Old Basing
RG24 7JL

OS Map Reference

SU 678 523
A static map of Mapledurwell Fen and the Hatch Nature Reserve

Know before you go

3 hectares

Entry fee

Donations welcome

Parking information

Park on the roadside near entrance

Grazing animals

The Hatch – cattle from May to August
Mapledurwell Fen – cattle in August

Walking trails

There are no footpaths over this site


There are no footpaths over this site and it is wet. Contact the Trust for disabled access information


Guide dogs only
Guide dogs and Assistance dogs only

When to visit

Opening times

Open at all times

Best time to visit

Visit in spring to see a beautiful display of wildflowers

About the reserve

Rare fen plants have found a haven at Mapledurwell Fen and The Hatch, the last fragment of what was once Mapledurwell Common. Flora like the delicate marsh helleborine, bog pimpernel and ragged robin are some of the reasons why this patch has been described by botanists as the 'richest half acre of Hampshire’.

This fen is only accessible with a permit, but the hatch is open access.

Contact us

Graham Dennis

Environmental designation

Site of Special Scientific Interest (SSSI)

Location map