The Neils on Wheels Bike Touring Team took on the 50 mile option at the Brandywine Bicycle Club's Dog Daze Century, held outside of West Chester, in rural Chester County. Check out that elevation profile! More than 2700 feet of climbing!
Neil F. once noted that he's faster than me, but I have greater strength and endurance. So it proved for much of the ride. Neil and I would alternately drop one another - he would pass me on the flats, and I would pass him going uphill. At one point I was about five minutes ahead of Neil, but he caught up to me. Despite my riding a road bike and Neil riding a mountain bike, our speeds were very close, and in fact we finished the final four or so miles together.
Fellow Bike Forums posters "freemti" and "uncadan8" also rode with the Neils on Wheels team. At least until they dropped us. :-(