I have just discovered this site and have started reading all of the very interesting thoughts from others--I, too, am in the fifties age group and started doing more serious biking these past two years. The Katy Trail in Missouri is a great place to ride and that was a personal challenge for me this past summer as I rode 3 out of the 5 day trip sponsored by DNR. (I rode on my trainer on and off in the winter, but in April I began training in earnest and worked up to riding 30-40 miles comfortably at a faster pace than we traveled on the Katy). I wasn't sure I could ride 66 miles in one day, but I did it plus two more days of lesser miles. Yes, ladies, we can do what we put our minds to and have a great time challenging ourselves!