After his death in 1865, the Grant family bought the Glenfarclass distillery, which was founded in 1844 by Robert Hay. Glenfarclas is now run by the 5th and 6th generation, John and George Grant. They have casks made in the Spanish sherry region and first lend them to a good Bodega for at least 5 years. This way, they monitor the quality of their barrels and ultimately their Whisky. This 25 year old has had a full ripening on such good sherry casks.
