Google maps link
Just checking what happens when I've created directions for 10 destinations in Google Maps and copy the url, then paste as a link. Here's directions. And here's directions that concatenated two different sets of directions to overcome the 10 destination limit. What I did was to create a second set of directions with the starting point being what should be #11 destination and adding several more. I copied the URL for that just with the names of the city, states and went back to #1 set of directions and edited the url to add stops 11-17 (removing all the lat/lon numbers at the end.