I haven't looked in great detail, (I can't make it on Tuesday) but some of the route might be blocked for Spectator access from Cheshunt Station to LVWWC.
Not sure if it's in session when you'll be riding, or if there are parts fo the bike route closed, but might want to check the route against the travel map.
FYI - the Killing Me Soft Lea route looks to go right near Cheshunt station and the Lee Valley White Water Centre - Olympic venue.
http://www.bikemap.net/route/949495#lat=51.670433506038&lng=-0.011782613525427&zoom=11&maptype=terrain
I haven't looked in great detail, (I can't make it on Tuesday) but some of the route might be blocked for Spectator access from Cheshunt Station to LVWWC.
Not sure if it's in session when you'll be riding, or if there are parts fo the bike route closed, but might want to check the route against the travel map.
http://www.london2012.com/venue/lee-valley-white-water-centre/maps
Just a heads up.