About ¾ or three fourths of the way, you can stop at Poland Spring, ME. This is about 13 minutes north of Gray, or about 5 minutes southeast of Poland.
If you drive straight through without stopping at all, the total distance is 13 miles. The distances shown above don't include local roads to get into each town, so if you're planning a long road trip, make sure you factor in traffic and road conditions, rest stop breaks, and interesting detours along the way. If you're in a rush, you can do the trip with zero stops, and your total travel time would be around 18 minutes.