Castle Howard by Hawksmoor. The grounds of Castle Howard are also used as part of at least two charity running races during the year. Located on the Estate, but operating separately to the house and gardens and run by an entirely independent charitable trust, is the Yorkshire Arboretum. Originally created through the enthusiasm and partnership of George Howard (Lord Howard of Henderskelfe) and James Russell, over a period of eighteen years, from 1975 to 1992, it was opened to the public for the first time in 1999 and a new Visitor Centre opened in 2006.The arboretum's extensive and important collection of 6,000
Castle Howard of Henderskelfe and Naworth Castle as well. The house is surrounded by a large estate which, at the time of the 7th Earl of Carlisle, covered over and included the villages of Welburn, Bulmer, Slingsby, Terrington and Coneysthorpe. The estate was served by its own railway station, Castle Howard, from 1845 to the 1950s. After the death of the 9th Earl in 1911, Castle Howard was inherited by his younger son Geoffrey, with later earls having Naworth Castle as their northern country house. In 1952, the house was opened to the public by the then owner, George Howard, Baron Howard