I've managed to obtain a sneak preview of the race route. It's a kind-of short-sticked triangular lollipop

It goes out and comes back under the railway bridge. On the way out it then turns left and goes nearly to Wooler Knoll. It then turns right and runs down through the trees to its far point where you turn right again and run up Win Hill. It then follows almost a straight line to go under the railway again and back to the start.

I guess they needed to keep it quite secret, as some of it is on private land.