@legend - it's imposible ro get lost, although there are a couple of canals joining it, it is clear they are not the route. Basically if you keep going in the direction that you started and unless you are wet then you are going the right way!
I looked at doing this as it was relatively local and the course does look great, but I have no interest in raising £100 sponsorship in order to run. In all honesty as a fund raising strategy it seems very shortsighted. £17 entry including a medal and a tee shirt, why not just up the entry fee a little and drop the tee or medal in order to make more money from the entry fees?