Paddling from the Perkiomen Bridge in Collegeville to Hoy Park just prior to the SEI damn. Via canoe or kayak, a leisurely the trip takes slightly more than 2 hours. Generally, stay left when then the river splits. If the water level is 1.5 feet, there will be 3+ places where you may need to get out due to shallow water. Over 1.6 feet, there should be no extremely shallow water.
This is a Google Earth Pro (now free) flyover of a 3.5 mile segment of the Perkiomen Creek between the Perkiomen Bridge in Collegeville to Hoy Park.
It was created by doing the following;
1. Install the free Google Earth Pro
2. Drawing the a path down the river. Showing the properties of this path shows the length by canoe is 3.58 miles.
3. Recording a tour of the path.
4. Recording a movie of the tour.
Google Earth is a quick way to get a preview of where you are going and provide an accurate distance measurement. To add a voiceover seems to require following a set of points rather than a path.
why stop there? could you portage the next two dams and get to the surekill?