| Site of Special Scientific Interest | |
 | |
 Location of Castor Flood Meadows. | |
| Area of search | Cambridgeshire |
|---|---|
| Grid reference | TL 123 972 |
| Interest | Biological |
| Area | 41.8 hectares |
| Notification date | 1986 |
| Location map | Magic Map |
Castor Flood Meadows is a 41.8-hectare (103-acre) biological Site of Special Scientific Interest on the western outskirts of Peterborough in Cambridgeshire.
This site on the banks of the River Nene is a remnant of formerly extensive flood meadows. Flora include slender tufted-sedges, early marsh-orchids and the nationally restricted narrow-leaved water-dropwort.
The Hereward Way long distance footpath goes through the site.