 Windsor Castle 's position on top of steep ground has meant that the castle 's gardens are limited in scale . The castle gardens stretch east from the Upper Ward across a 20th @-@ century terrace . Windsor Castle is surrounded by extensive parkland . The immediate area stretching to the east of the castle is a 19th @-@ century creation known as the Home Park . The Home Park includes parkland and two working farms , along with many estate cottages mainly occupied by employees and the Frogmore estate . The Long Walk , a double lined avenue of trees , runs for 2 @.@ 65 miles ( 4 @.@ 26 km ) south of the castle , and is 240 ft ( 75 m ) wide . The original 17th @-@ century elms were replaced with alternating chestnut and plane trees . The impact of Dutch elm disease led to large @-@ scale replanting after 1945 . 
