Planning a Sponsored Ride to the Olympic Site

My wife is planning a sponsored ride from her school in Hemel to the Olympic site for next month, so we drove the route yesterday to check directions etc. Then we went for a walk in the Lee Valley lakes area. The final leg of the journey is down cycle tracks along a canal from there to Stratford. The route on the road section is here:

http://www.mapmyride.com/routes/view/85916077?fb_action_ids=362916243760299%2C362907497094507&fb_action_types=mapmyrideapp%3Amap&fb_source=other_multiline