Bar Harbor Ferry: Service runs June 15 through Aug. 30. Travels to Winter Harbor on the Schoodic Peninsula daily. From Bar Harbor (June 15-22), two roundtrips daily, 11 a.m. and 5 p.m. Departs Winter Harbor (June 15-22) 10 a.m. and 4 p.m. From June 23-Aug. 31, the ferry departs Winter Harbor every two hours between 8:30 a.m. and 5 p.m. From Bar Harbor, the vessel departs every two hours from 9:30 a.m. to 6 p.m. Through September, the schedule returns to two roundtrips daily. 288-4585, 546-2927. www.downeastwindjammer.com.
Frenchboro Ferry: Year-round service between Bass Harbor and Frenchboro, 8½ miles in 50 minutes. 244-3254, www.mainestateferryservice.gov.
Eastport: East Coast Ferries. From Eastport service between Campobello Island and Deer Island mid-June to end of September Deer Island to Eastport late June to Labor Day. (506) 747-2159, (877) 747-2159. www.eastcoastferries.com.
Northeast Harbor: Beal & Bunker Boat Service. This year-round mail boat/ferry travels daily to the Cranberry Isles. Explore the islands and catch a later boat back to Northeast Harbor. 244-3575, www.cranberryisles.com.
Southwest Harbor: Cranberry Cove Boating. Travels to Great Cranberry and Islesford. Departs Upper Town Dock every two hours 7 a.m.-5 p.m. Departs Islesford every two hours 8 a.m.-6 p.m. 288-4585, 546-2927, www.cranberryisles.com.
Stonington/Deer Isle: Isle au Haut Boat Co. Year-round ferry/mail boat makes daily trips between Stonington and Isle au Haut. Crossing time is 45 minutes. Seasonal ferry makes trips between Stonington and Acadia National Park at Duck Harbor. Crossing time 1 hour 15 minutes. Construction alert: Allow extra time to cross the Deer Isle Bridge; repairs run through October. 367-6516. www.isleauhaut.com.
Old Quarry Ocean Adventures: Seasonal trips from Stonington to Isle au Haut. 367-8977. www.oldquarry.com.
Swan’s Island Ferry: Year-round service between Bass Harbor and Swan’s Island, 6 miles in 40 minutes. 526-4273, www.mainestateferryservice.gov.