Leith Hill is a wooded hill some 7 km to the south west of Dorking, Surrey, England. It reaches  above sea level, the highest point on the Greensand Ridge, and is the second highest point in south-east England, after Walbury Hill near Hungerford, West Berkshire, high. It was possibly on the summit of Leith Hill in 851, that Æthelwulf of Wessex, father of Alfred the Great, defeated the Danes who were heading for Winchester, having sacked Canterbury and London.