The site covers nearly 40 hectares. It is a classic river mire sitting on a wide flood pain. Glacial deposits may be present having diverted the river’s previous course, which apparently went to the west coast of the peninsula. This is the largest surviving valley mire in Pembrokeshire. The important ecologies are tall-fen communities, wet woodland with lichen, and grazed marshy grassland.
The river begins here as the confluence of the drainage creeks for the fen; it is hard to believe at this point that this small stream will become the large river that discharges over the weir at Haverfordwest.This is the source of the western Cleddau and is the largest surviving valley mire in Pembrokeshire. It is a rare habitat and contains a number of species that are only found on this site in Pembrokeshire. The wetland acts a s a buffering reservoir for the river flow, and hence can act to moderate rapid increases and decreases in river flow during extreme weather events. The fenland and wet woodland are managed jointly by CCW and the Wildlife Trust of South and West Wales.
Access
Boardwalks allow people to visit the tall fen communities.
Parking
Parking at present is very limited.
Walks
This site contains extensive walkways through the reserve providing wheelchair access.