Walk #5 to Tiburon by way of Sausalito happened as planned, on the 5th of this month. A hiking-friend and I parted company at the Sausalito ferry, and I made it to Tiburon in time to catch the 5:00 (PM) ferry to the SF Ferry Building. Another (approximately) 17-mile day.
Regarding the physical challenges of distance walking, especially over the course of days, weeks, and months(!): Though it feels as if I am no longer young, I remember that I wasn't young on my last pilgrimage either! Suffice it to say I am not one of those lucky pain-free individuals, but so far am encouraged enough to think that a combination of conditioning and faith might carry me along for a while!