The King, who is also the Duke of Lancaster, was greeted at the railway station from the royal train by the Lord-Lieutenant of Lancashire, Amanda Parker.
He was also handed the keys to the castle in front of the John O'Gaunt gateway as part of an ancient ceremonial tradition.
The monarch has taken part in the Ceremony of the Keys when visiting the castle since 1851, when keys were first presented to Queen Victoria, with Queen Elizabeth II taking part in 2015.
Here is a selection of photos taken by readers who managed to get a good spot to take a candid snap as the King passed by.
See also photos by our photographers Kelvin Lister-Stuttard and Michelle Adamson: https://www.lancasterguardian.co.uk/news/national/37-historic-pictures-as-king-charles-makes-official-visit-to-lancaster-castle-5168066



