Tidmouth Bay is a station and castle located on Toby's Branch Line near the old mine. It only appeared in the fifth and sixth seasons and in stock footage in the seventh season. The castle was found by Toby and Sir Topham Hatt after his grandchildren showed him a map featuring the castle.
Shortly after it's discovery and restoration, the station was built and a fairground was located here. James took Mrs. Kyndley to the fair to cheer her up after her sister could not visit.
In the sixth season, an additional island platform and tracks were added. Alicia Botti and the Sodor Brass Band have been known to perform here.
- The station shares the same design as Maithwaite station.
- Concept art for King of the Railway shows that Tidmouth Bay would have appeared as the railway station for Ulfstead Castle. This was never used in the final special for unknown reasons.