At a latitude of 17 deg 35 min N, Zihuatanejo is more south than the big island of Hawaii, and is the furthest south we will go until we depart for the South Pacific in March.  The air temperature was a predictable 90 deg F and the water was around 82 deg.  Seattle is 47 deg N, so we were 30 deg of latitude away, and since each degree of latitude is 60 miles, it works out to 1800 miles south of Seattle.  Since we also traveled a significant distance east (about half the distance from San Francisco to Philadelphia), and made a lot of side-trips, our total mileage from Seattle to Zihuatanejo is 3,450.  We’ve been tracing our journey showing all of our main stops on a map: