Turns out the Second Annual Big Parade on July 12-13 (a 2-day, 35-mile walkathon and campout)aspires to climbing 101 public stairways in Los Angeles! The course is designed to be completely walker-friendly--even to lazy walkers. You can join for an hour or a mile, whatever. The Big Parade Facebook Page is full of information.
In advance of The Big Parade, many warmup walks--from three to twelve miles--are planned over the next couple of months. SOme meet in front of the Music Box stairs or at Angel's Flight. One will hike from Griffith Park to the Hollywood Sign during the full moon! Find a list of these practice walks at the Facebook page or at The BigParadeLA website.