I rode by myself today. It was windy. At one point (for about 15 miles) I thought maybe the rapture was indeed upon us. Psycho winds and rain pelting me in the face and I couldn't see a thing. Lovely. But I came through 112 miles still alive and unscathed in 5:37, avg HR 144.
I stayed completely aerobic the whole time... perfect because it meant I was burning mostly fat for fuel, which is a good thing when you're planning on being able to run afterward. I ran spot-on race pace for an hour afterward (gotta love Garmin's avg pace feature) and felt fine. I wish I would have signed up for IM Tex-ASS.