I remember one time cycling from Southeast Coastal Florida to San Diego California. I was using the interstate. There it is allowed. I was far out west. I stopped in a restaurant or something to drink and a bite to eat. I got in a conversation. Somebody warned me about the dreaded Telegraph Hill farther west. I was told other cyclists going west seemed to be concerned how about the dreaded Telegraph Hill. Well, by the time I got to Telegraph Hill I hardly noticed it was there. My legs where is sufficiently strong by that time that the dreaded Telegraph Hill seemed more like making a mountain out of a molehill. But whatever the case oh, the road definitely was not flat. Look at that stretch of road between El Paso Texas and Las Cruces New Mexico. Highway 20 I think it is. If ever there were a road that could be described as flat, Highway 20 fits the category. It is an agricultural plane. But even that road has some kind of change of elevation between the two cities. It is just that the elevation change is so small and averaged out how long such a distance, it is not noticeable. It is not perceptible bicycling difficulty or by looking at it. I asked two people in a pickup truck in one city oh, can you give me an idea of the lay of the land up ahead on this highway. One man told me it's no problem. It's like a plane. Of course I followed that road. It was a roller coaster ride. If it wasn't going uphill it was going downhill. If it was not going downhill it was going uphill. I find that very interesting. Not to mention the fact I have done exactly the same thing myself. Oh sure, no problem oh, it's flat all the way.