Hi aka_kim and welcome!
I've done 4 El Tour rides and they are by far the best, biggest and most fun century ride I have ever done! I can't say enough good about my experiences, if you get a chance to do one you won't regret it!
Here is a link to El Tour info;
http://www.pbaa.com/Home.html
I hope it helps, feel free to email me with any questions.
Kate
Life is like a 10 speed bike, we all have gears we never use.
Charles Schultz
"The bicycle is just as good company as most husbands and, when it gets old and shabby, a woman can dispose of it and get a new one without shocking the entire community." — Ann Strong, Minneapolis Tribune, 1895