Bart Yasso, Chief Running Officer at Runner’s World Magazine designed the course and yes, a river runs through it; the Lehigh River to be exact.  As Bart likes to say; it’s a course designed by a runner for a runner. This downhill course starts at Lehigh Valley Hospital in Allentown, PA. Maybe an odd location to start, but it’s easy to find and has plenty of parking. It’s a quick trip to the Lehigh Parkway, past the Fish Hatchery, across a covered…