The Porcupine Islands are an archipelago of five islands that lie in the Mount Desert Narrows of Frenchman Bay in Bar Harbor, Maine, United States. The Porcupine Islands consist of Sheep Porcupine Island, Burnt Porcupine Island, Rum Key, Long Porcupine Island, and Bald Porcupine Island. Bar Island, which is part of the same geological formation, is occasionally considered a part of the Porcupines as well. All of the islands, except for Burnt Porcupine, are maintained by the National Park Service through Acadia National Park. The islands also serve as nesting grounds for various sea birds, like bald eagles. The islands can be accessed through sea kayaking or through local boat tours out to them.