Originally Posted by stapfam

Dead Flat terrain is not a problem unless it is open to the elements. I have just such a ride and I always look at the weather before doing it. It is the wind that is the problem and if 10 mph is forecast for the area- it can be 15 on this ride and as it is an out and back it will be a headwind for at least 50%. 20 miles into a headwind can get tiring on even the flattest of routes.