Another pleasant day of riding 70 miles on sunny weather on Texas country roads. Today, finally, the winds were at our backs, for the most part. 

At mile 21, my chain (which had loosened a bit in the last 4 weeks) popped off. With my bike's internally-geared hub (and no derailleur with a tension gear), I had trouble putting the chain back. It was  wedged between the hub and the frame. So I called Tom, our mechanic, who drove back from the mile 24 sag stop and helped remove the rear wheel and put the chain back in place. Later, in camp, he'll adjust the bottom bracket and thereby tighten the chain.