Thanks everyone. I'll need all the help I can get.
Yeah, KS, it is net downhill of 366' but I didn't find it all that easy last year. The first half never stops rollling, which can take the starch out of your legs if you're not ready for it. By comparision Boston drops 465' from start to finish and I've never heard anyone say it was easy. For sure that elevation map makes it look a lot friendlier that it is.
Forecast is for 35 degrees for 7:00 start, warming up to 40 by 10:00, with no rain or wind. Although I'm not used to it that cold it sounds like near perfect for marathoning.