The Fifteen Mile Creek Aqueduct is located near mile marker 141. It’s a single-arch structure with the upstream wall missing, which is typical of most of the smaller aqueducts along the C&O Canal. However, for thirsty cyclists and hikers, it’s a sure sign that Bill’s Place is a few turns of the pedals away. The creek flows through the western end of the Fifteen Mile Creek Campground and has a boat ramp near its mouth on the Potomac River. The aqueduct also marks the end of our volunteer area in the park, so I’m not sure why it took us so long to take a picture.