A York woman is missing after the canoe she was in overturned on Flagstaff Lake on Saturday evening. The woman, two friends and a dog were paddling on the lake in Dead River Township about 5:20 p.m., when the boat flipped and knocked them into the water, according to Mark Latti, a spokesperson for the Maine Department of Inland Fisheries and Wildlife. The two men grabbed lifejackets and swam to shore with the dog.