Pic: leaning on the parapet atop the Stockton tunnel.
Various people asked for some walks, giving me more than a month advance notice, so mark your calendars for Sunday May 11, Sunday May 25 or Sunday June 1 if you’d like to show up and join in. No reservations required, or taken.
Noon start near the n.w. corner of the Main Library in San Francisco.
As simple as that.