Tees Valley Wildlife Trust
The Tees Valley Wildlife Trust is a wildlife trust covering the Tees Valley area of England.
Its area of operation corresponds to the four unitary authorities of Hartlepool, Stockton-on-Tees, Middlesbrough and Redcar and Cleveland, covering parts of the ceremonial counties of County Durham and North Yorkshire.
Reserves
The Tees Valley Wildlife Trust manages fourteen nature reserves with over, including:| Reserve | Area | Grid reference | Owner |
| Cattersty Gill Nature Reserve | |||
| Maze Park Nature Reserve | 17 | ||
| Portrack Marsh Nature Reserve | 20 | ||
| Portrack Meadows Wildlife Reserve | |||