What happens when a bunch of riders who like to go on really long bike rides gets together and decides to host their own events in order to give back to the cycling community? You get the Quack Cyclists , and their annual Devil Mountain Double (DMD) and Knoxville Fall Classic Double Century (Kx) rides, that's what. Plus, not only do you get two local Bay Area doubles in which to participate, you get two high quality local doubles in which to participate, and life, you will say to your self, hardly gets better. The DMD is held in mid to late April each year and the Knoxville is held in mid to late September each year, and while the Knoxville is clearly the easier of the two, the Knoxville Double is clearly not easy . I have fallen into the pattern of volunteering each year for the Devil Mountain Double and then riding as a participant in the Knoxville Fall Classic Double Century. This year, I completed my seventh Kx Double and 21st Triple Crown certified double century. My riding...