2:31 last year in tougher conditions so hopefully you can make a decent improvement on that.
One approach would be to make a note of last years splits. CLICK HERE to see you run last year. Then try and run each mile 15-30 seconds quicker than last year.
It’s a good challenge as it means you focus on the mile you are in rather than how far you have to go. I think you could go 3-6 mins quicker than last year.