I did a trial run of the 10k route last weekend,
I was running relaxed with my wife, her pace not mine. But we did quite well. I used endomondo to track my run, unfortunately the app crashed in the last 10k. Looking at the lap times, we definitely could have done better.
I’m hoping on the day the huge amount of ppl will get us pushing ourselves faster a bit more.
Blog Of Bobby :p 
I love that the app has a rabbit and a turtle to determine between speeds haha!! Good luck with your race!