 The path to Brougham Castle leads from east to west . To the south , or the left of someone approaching the castle , are the earthworks of the Roman fort and the location of the 17th @-@ century garden . The ground is terraced , and to the north the land slopes down towards the River Eamont . A moat runs alongside the east , south , and west faces of the castle , its width varying between 10 and 15 metres ( 33 and 49 ft ) and lying up to 3 @.@ 4 metres ( 11 ft ) deep . Although the moat is now dry it is likely that it used to be filled with water . The castle is an irregular polygon , measuring about 68 metres ( 223 ft ) along the west side , 72 metres ( 236 ft ) along the south , 48 metres ( 157 ft ) wide in the east , and 54 metres ( 177 ft ) on the north side . 
