My best estimate for most efficient walking route between all Seattle Library locations

I got bored today and so I thought I’d try and estimate the best route to walk between every Seattle Library location. I wrote in an Excel sheet the walk times between every location and then used a greedy method of continuously picking the shortest route remaining between two libraries until forming a full loop. ~23hr, ~60mi urban hike. Adding Magnolia-> Broadview to close the loop is another 3 hours and 7 miles.

This does allow for taking the water taxi between Queen Anne and West Seattle considering Google Maps includes that in walking instructions. Also I had to draw the last little bit of the path on the second image since you can only do a max of 25 destinations in Google Maps itself.