Urban Iditarod:

This is an annual gala which Claire attended in 2001 solo, as Mark routinely prefers flying to barking. Yearly about 150 San Franciscans dress in a manner they feel is appropriate to pull a shopping cart through the streets of the city, barking. Regular pit stops are made for brewed refreshment, where someone with a bullhorn reminds them derisively that this is not, repeat not, a race.

More amusement is generated by passing by such well-populated tourist attractions as the cable car turnaround and Union Square.

Initially attending as an observer, Claire found herself being pushed uphill on her bike by her friend Rich, who repeatedly yelled "Mush!" while she woofed appropriately.