Going into the game without their two goalkeepers, Garforth were always in danger of conceding a few, although it was an own goal that gave the visitors a slender half-time lead.
Lee Turner added another pre-season goal when he slotted in a penalty after the break, but Knaresborough went on to add four more to their tally.
Adam Turner headed a consolation for the Miners late on.
Goals from the game will be online tomorrow...