Did the Haul Ash Ride (to commemorate the eruption of Mt. St. Helens) from Redhook brewery to Freemont - a 42 mile round trip. Sounded like a nice social ride, all on the bike trail, relaxed pace, etc. Only they let loose about 1000 riders on the trail all at once. Crazy-ness ensued... I will never do that again. I was behind a woman in the midst of all that talking on her freaking cell phone... 
The mid-point stop was a pub into which said 1000 riders tried to pack in all at once, and they wouldn't let you out of if you had any kind of a drink in your hand. I have issues being in a place that packed in and noisy for very long.
But, we were very fortunate with the weather, it threatened rain a few times, but never really did, stayed cool and overcast, perfect riding weather. And as crowded as it was, I managed to get a 13.5 mph, which is good for me! 
Sunday was the antidote... we went out by ourselves on the Centennial Trail. It was like heaven, quiet and only a few other bikes. Although it did sprinkle a bit on us, I didn't care, and did a peaceful 16 miles of beautiful country riding.
Luvmyguys, 66 miles is no small thing, congratulations are due!
"Don't go too fast, but I go pretty far"