The Lea Valley Walk is a 50 mile long distance footpath located between Leagrave, the source of the River Lea near Luton, and the Thames, at Limehouse Basin, Limehouse, east London. From its source much of the walk is rural. At Hertford the path follows the towpath of the River Lee Navigation, and it becomes increasingly urbanised as it approaches London. Locations on the walk, in order, are Luton, Harpenden, Wheathampstead, Welwyn, Hatfield, Hertford, Ware, Hoddesdon, Cheshunt and Waltham Abbey. In Greater London the Boroughs traversed are Enfield, Hackney, Haringey, Newham, Tower Hamlets and Waltham Forest. The walk was opened in 1993 and is waymarked with a Swan logo.