By the "Camino of Santiago” (the French path), between the stages of Burgos and Carrión de los Condes.
42º 17´ 17.5´´ N
4º 08´ 23.3´´ W
You have buses from Burgos to Castrojeriz from monday to friday at 17h.
There are two possible ways once passed Burgos; one is to take the N-120 direction León (exit Villasandino) or by taking the N-620 direction Valladolid (exit Villaquirán de los Infantes).
You can fly to the Civil Airport of Burgos and from there go to Castrojeriz.