Hi
only works wilkie if you know the course and are good with the OS map and have a copy 
the first 7/8 miles are mainly slightly downhill with a few small little inclines...........then at 7/8 miles they send you up the side of the mountain...........this is a nasty climb.....but then you get to run down the other side............a couple of flat miles and then you have to run back up the valley to the start...........
don't go off too fast as it is downhill in general and it will be even harder when you turn around and have to do the slight uphill back to the start.........
its a brilliant race especially if you are doing a spring marathon............if you can keep strong in the last 5 miles then it bodes well for the marathon
so only one real hill on the course
good luck