Transport
Hogwarts Express
The Hogwarts Express is the scarlet steam train that runs from Platform 9¾ at King’s Cross to Hogsmeade Station at the start and end of each term. Compartments, the food trolley, and prefect carriages structure the ride. Dementors board it in the third year, and Draco petrifies Harry on it in the sixth.

First mention
Harry Potter and the Philosopher's StoneChapter: The Journey from Platform Nine and Three-Quarters
Harry boards the train after coming through the barrier and shares a compartment with Ron.