It seems to me that most scenic areas where rides are held are hilly (the high relief is generally what makes them scenic), so it is difficult to concoct routes in those areas with less than about 5000 feet of climbing per 100 miles. In the area I live in, with few exceptions virtually all 100 mile rides involve 8000 to 10000 feet of climbing. This is why I gear all my former racing bikes lower than they were back when the young hard men were riding them. If I had bikes like the ones you are describing then I'd only ride them on short non-hilly rides such as the Eroica Piedras Blancas route described above.