I think it's a New England term for checking out the leaves in the fall as they change colors. Of course, my family is known for messing up these quotes, so it might called something else by others.
Basically, the leaves have started changing colors from green to orange/yellow/red and we want to go to some pretty places and look and take pictures. Should be interesting as we drive north from CT and the farther north we get the leaves should be getting more fall colors. Just started changing here in Northern CT.