i do one or two a year, and then quickly regret it. During the school year i don't have 6 hours to ride on the weekend. I can't take a 1 hour lunch break.

In the middle of the summer when most of my riding is easy in between races i love riding with slow people. I have all day (i think my girlfriend's second swim practice ends at 3 pm, so i don't need to be free until after 4).