4.3 miles. Wasn't so bad. Actually pretty damn cold for the first 2 miles since I hadn't warmed up and was going into the head/cross-head wind. Last two miles or so were fairly pleasant though. Tights would have helped, since I had to HTFU and do some tempo speed to keep the temperature up.

On the positive side, just think of all the extra calories my body burned while staving off hypothermia. I'll be skinny in no time.