Perhaps this is the place to get an answer to a question that has been bugging me. I have no idea how to determine the % grade of a given hill. I don't have GPS and topo maps don't really help me. So I tried Map My Ride and the values they show for a given hill seem really low. For instance a hill around here that is known (by local long time cyclists....the guys who truly are into the sport) as a 6% hill show up on Map My Ride as barely over 2%. I have no idea how to get an accurate measurement.