| Site of Special Scientific Interest | |
 | |
| Location | Avon |
|---|---|
| Grid reference | ST760725 |
| Interest | Biological |
| Area | 156.1 hectare |
| Notification | 1997 |
| Location map | English Nature |
St. Catherine's Valley (grid reference ST760725 ) is a 156.1 hectare biological Site of Special Scientific Interest southwest of the village of Marshfield, South Gloucestershire, notified in 1997.
At the Marshfield end of the valley, a large naturalised population of Dragon's Teeth (Tetragonolobus maritimus), a species not native to Britain, is present; it was first found by Rev. E. Ellman in 1927. [1]
