I'm in for this not ran for three weeks due to injury and little lad being in and out of hospital.
If it is like anything in the past the start and finish is around the market and squires area. The route was three laps around flag market and Avenham, onto Avenham park for what was like the 5km in May and then back towards the market. Get some hills in as you have Avenham park (up and down) but what catches you out is going up Winkley Street, as that is another hill.
But this is whats happened in the past and could be different this year, I agree with penguingirl that there is no info at all about this event.