Tom from Pgh PA on 10/6/2019 9:51:29 AM:
Possibly the section between Williamsport and Shepherdstown would be good for you if your coming from Allentown. Williamsport is probably the nearest trailhead to you, plus the Conococheague aqueduct at Williamsport was just rebuilt and rewatered & appears to be an interesting location. Also the concrete structure section of trail at Slackwater around mile 87 is worth seeing although probably not recommended for inexperienced riders & kids due to the unprotected drop to the river. If you have access to Google-Earth you can actually see what the trail looks like in "street view". Not sure how they filmed the trail, maybe in an ATV, but it gives you an excellent view of the trail as you would see it from a bike. Possibly have lunch in historic Shepherdstown, then back to Williamsport for a do-able 55 mile day.