Assuming it's a relatively typical course. Mostly flat with a few rolling hills and maybe factor in one tough hill near the finish, can you predict my 5K off of these runs/workouts? (I figured giving several different workouts would provide more information to make a better guess.)
Workout 1: 800, 800, 1600, 800, 800, 1600, 400, 400
2:54, 2:52, 5:51, 2:52, 2:51 5:48, 69, 67
Rest: 2 mins. after 800, 4 mins. after 1600, 60 secs. after 400
Tempo Run: 7.2 miles in 48:34
Workout 2: 8x720s
2:29, 2:26, 2:27, 2:27, 2:28, 2:29, 2:27, 2:26
(It's a grass loop in a park near our school. It isn't perfectly flat and the distance may be a few meters off.)