This may seem like a daft question but this will be my first half and only my third race and I dont know how fast I can/should run over 13 miles.
My time for 6 miles is around 45mins and I can run at 7:30 ok. If I go on a longer run I obviously run within myself. My longest run to date is 10 miles in 1hr 25. The complicating factor is the first half is downhill and the return in uphill.
I want to run the best time I can but not failing to finish whilst trying. The doubts are creeping in and I have not got a plan yet to tackle them. Is there a formula?