Warren Island State Park

Warren Island State Park, a 70-acre spruce-covered island in Penobscot Bay about three miles off Lincolnville, is Maine's first state park developed exclusively for the boating public - your own boat is required; there is no public ferry to the island and no vehicle access of any kind. Combining the park's own live page ("12 campsites or the three Adirondack shelters") with the Bureau's own "Outdoors in Maine" guide's finer breakdown ("nine wooded campsites, three group campsites, three Adirondack shelters"), the 15 sites here break down as 9 individual sites, 3 group sites, and 3 Adirondack shelter units, all bookable through CampWithME.com like any other Maine State Park site. No electricity, telephone service, RV dump station, or standard utilities exist anywhere on the island. There are no showers on the island itself: the park's own map lists "Showers" only inside a separate, private mainland "Boat Yard" concession (with gas, laundry, ice, and snacks), not as on-island infrastructure. A limited number of first-come, first-served moorings are available for a $20 fee. Open seasonally, Memorial Day to September 15.

Maine Bureau of Parks and Lands statewide camping fee schedule (maine.gov/dacf/parks/camping/reservations/campground_fees.shtml), per night, shown as Maine Resident / Non-Resident (an asterisk marks parks with a higher rate for sites with a water & electric hookup, shown second): Aroostook $15/$25 (hookup $25/$35); Bradbury Mountain $15/$25; Camden Hills $25/$35 (hookup $35/$45); Cobscook Bay $20/$30; Lake St. George $20/$30; Lamoine $20/$30; Lily Bay $20/$30; Mount Blue $20/$30 (hookup $30/$40); Peaks-Kenny $20/$30 (hookup $30/$40); Rangeley Lake $20/$30 (hookup $30/$40); Sebago Lake $25/$35 (hookup $35/$45); Warren Island $15/$25. An additional $5 per site, per night is charged for reservations, and a 9% Maine Lodging Tax applies to all camping fees. Maine residents 65 and older receive free day-use admission (camping fees still apply). Statewide season: online reservations open February 2026 for the 2026 season and run through 9/12/2026; after 9/14/2026 remaining sites become first-come/first-served for the rest of each park's own season. Pets are allowed at this campground under Maine Bureau of Parks and Lands' statewide policy ("Outdoors in Maine" visitor guide): leashed pets under the handler's physical control, not left unattended, waste picked up immediately; pets are not allowed on any Maine State Park beach April 1 - September 30.