So it was a week after Father's Day, and I had to drag them up at dark-30 in the morning to get them there on time, but I was able to follow this all morning long.
Yeah, my younger son is a bit slower than my older son, but he worked so hard. 25 miles and nary a whimper or whine. On the way home, he even said "I need to work on hills. I mean, I don't want to work on hills, but I need to."
My older son never complained, never moaned about riding too slow. He even helped the younger one up some of the steeper hills.