According to the Maine Foliage Report the Northern part of the state is reaching peak–but don’t worry, for visitors to the southern part of the state, six hours drive south and on the coast, the leaves are just starting to change, and are at least 2 weeks away from reaching full color.
The Maine Foliage report is updated each week, and also has a list of some of the major activities happening that week and lists where you might see the best foliage and scenic drives. Maine also has an official foliage website Maine Foliage they include more photos, and a weekly foliage report by email.