All weekend, it’s Old Town Riverfest, with lots of community events along the Penobscot River in Old Town, including a parade, food and craft fairs, live music, and other entertainment. It’s also Autumn Gold weekend in Ellsworth, with fall-themed activities throughout Ellsworth all day on Saturday. Also on Saturday, it’s the 31st annual Paws on Parade event, a dog parade raising money for the Bangor Humane Society, is set for 10 a.m. at Husson University. And on Sunday, the Broadway touring production of “The Book of Mormon” is set for the Cross Insurance Center in Bangor.