This section begins at Riverfront Park on the West edge of Pottstown. (There is still, as of 2015, no finished trail through or immediately below Pottstown.) The route pretty much stays on the old Pennsyvania RR right-of-way up to Birdsboro. From there, the route is marked out with "Share the Road" signs further west until it rejoins some more finished trail. Ye Olde Photographer's first ride beyond Douglassville stopped short of Birdsboro, as his legs were relearning the concept of getting away from a computer desk!

This is part of the Thun ("tune") section of the SRT, named for Ferdinand Thun, a 19th C. Reading industrialist.