As I type this, Hubby is biking his way from Seattle to Portland in the Group Health Seattle to Portland Bicycle Classic. The length of the trip is about 200 miles, and while he will be doing it over a two-day period, some will cover the distance in one day.
I think he's nuts to do something like this, but it does sound like fun. He went down with a group of guys that he normally road bikes with and there will be about 9,000 people! Good times.