Originally Posted by
CliffordK
Do you have an example?
I poked around the map of southern PA with RideWithGPS, and couldn't find a road steeper than 10%, although I'm not convinced of the RWGPS accuracy.
While there are certainly PA hills steeper than 10% (there are hills in NJ with ruling grades in the high teens to low 20s), I think the OP is overestimating the grade, probably due to the fact that he doesn't seem to ride big hills often.