Lowther Castle is a country house in the historic county of Westmorland, which now forms part of the modern county of Cumbria, England. It has belonged to the Lowther family, latterly the Earls of Lonsdale, since the Middle Ages. It is a fully managed ruin, open to visits by the public to the shell of the castle and some of the gardens since 2011. Additional work was completed since that time, most recently on the extensive gardens. Francis Knollys escorted Mary, Queen of Scots to Lowther Castle on 13 July 1568 on her way to Wharton and Bolton Castle.