2nd increment Golf Company's SULE II hike was the hardest (9 miler).
~26 medevacs. We ran out of ambulances/medical facilities by the first stop (3rd mile). Had to wait for about an hour IOT get going again.
A lot of people were going down with low temps, but it turned out that Hyponutrimia was the issue. (Make sure you are hanging on to those salt packets in the MRE's and every 4th or 5th Canteen you drink, dump the salt into it. Tastes like shiat, but your body needs the sodium.)
Edit: Oh yeah, for the running: Make sure you are doing plenty of speedwork. If you can't run one mile sub 6:00 you aren't going to run 3 miles sub 6:00. My school has us do 6-8 milers nearly every PT session and we all felt pretty good physically at OCS.
Also, the PFT shouldn't be ran on a track. The MCO on the PFT says that the course shouldn't have a lot of turns like a track does. Most PFT courses are relatively straight, or if they are loops, they are BIG loops (like 1 lap = 1 mile size).