Opening day has arrived. (photo: Sunday River, Maine 10/19/2015) October 19, 2015 8:51 pm 800 × 533 PHOTOS: Opening Day at Sunday River Opening day has arrived. (photo: Sunday River, Maine 10/19/2015) Like this:Like Loading... Opening day has arrived. (photo: Sunday River, Maine 10/19/2015) Share this page:EmailPrintFacebookTwitterLinkedInPinterestRedditTumblrPocketLike this:Like Loading...