Wow! A lot of replies! Thanks to you all. I was referring to a hundred mile century, by the way.

The Amtrak Century Fredwina mentioned is the one I'm thinking about doing. It's supposed to be a good "first century". It's exactly what my parents did when I was a kid with some friends of theirs, except not organized and not all at once! They stayed in a hotel half way. It's a ride up the So. Cal coast from Irvine to San Diego and then you take the "party train" home, a private car with other riders. I remember hearing about their ride and seeing pictures and thinking how cool it would be to do that some day. When I found out there was an organized ride doing this very thing, I was all over it! I initially planned to do the 66 miles at Cool Breeze, Fredwina, but my kid's have a horse show that weekend.

The reason I'm curious what everyone's time was for their first century is because I have to do it in 8 hrs (12 mph avg) in order to take the train home. I'm hoping a girlfriend of mine is doing it as well and we can train for it together and ride together. She's stronger than me, so I'll probably be holding her back, but hopefully she won't mind hanging with me. She'll be doing her first century at Cool Breeze a month earlier. DH is also planning to sign up for it. He'd smoke it if he didn't stay with me. He just found out he was 4th out of 350 at a 10,400 elevation century he did yesterday. He's amazing. And quite inspiring. Anyways, I figure if I didn't feel confident about doing the century on my own, we can always ride the tandem. I sent an email asking if it mattered what we rode as long as we both signed up. So, at least I have a back up plan. I hear this ride sells out within 3 hours and registration is next Friday.

Thanks again for all your input. I'm so excited about doing this!