Today's weather would have been perfect for Keene, except it start to sprinkle. When I got out, it was cloudy, in the low 50's. I wore knees, arms, a base layer, head cap, full gloves. I think I got it right on the money. Unfortunately, it started to rain as I was making my way down to Keene. I think I hardly got about 1 mile into the descent before I turned around. To be concise, I felt ok making it to the summit of the descent. But, coming back, I felt sluggish. No telling, as the ride was cut short. Before departure, I felt somewhat light headed. I'm not sure why. I ate an energy bar and some Gatorade. Other notes, The bike was full of sand and soot, I wiped it down before the beginning of the ride.