The Marquess Course, designed by Peter Alliss and Clive Clark, European Golf Design (Ross McMurray) and Alex Hay opened in 2000. The course was named after the then Marquess of Tavistock and was soon referred to as the 'Jewel in the Crown'.

Set within 200 acres of mixed woodland the Marquess's course overlaps the county boundary dividing Bedfordshire and Buckinghamshire and presents a variety of rolling and undulating terrain. The predominant tree species are pine, spruce, sweet chestnut and oak, while there are a number of rare specimens such as Corsican pine, yew, rowan and beech.