So impressed with the guys who took me on my tour ( Bill & Anson). It was a slow day, so I was the only one on the tour (and I kinda felt bad about that, but they insisted we do it). Due to it just being me, I got the royal treatment. My goal was however to see the new visitor center at the top since a few years back when I did the tour, it was under construction. So me being solo today gave me a better than average time to look around the center and take in as much as possible which would have not been possible time wise had there been a full trip participation. Thanks guys, awesome. In addition, I got all kinds of tid bits from my tour guides which I really appreciated. So Bill did the driving and Anson led me down via mountain bike. Also very pleased they let me use my own bike. Anson was great, he was constantly looking back at me to make sure I was doing OK and he and Bill were both very encouraging on a coupe of the tougher uphill portions. Hey, I'm gonna be 69 next week, so not doing too bad. But yea, the altitude makes it pretty hard (I'm from Illinois at 700 or elevation compared toi 13,000 feet). I used my GoPro and I know I got some really great video footage. I'm copying it over to my laptop right now, can't wait to check it out. Again, my sincerest thanks for a super great day.