Many years ago, I was riding my ten speed bike on a long tour through Western Maryland into West Virginia. My bike was carrying about 35 lbs in the rear panniers. Heading home over the Catoctin Mountains, I'd had ridden through a series of long climbs and fast descents. I was a bit worn, as the late summer rains began to fall. Turning onto a long road that would lead me beyond the grand hills to a roller coaster of ups and downs for miles to come, I saw a yellow diamond shaped warning sign through the rain drops.