Annabessacook Lake · Monmouth, Maine

Private-island glamping with a downeast grin.

Unplug in a place where loons call the schedule. Canoes, campfires, and a little Maine magic await — near Winthrop, on the way to Acadia.

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Today on the island

A live look at conditions on Annabessacook Lake.

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Lake temp: 25°F

Pulled live from the island — so you always know before you paddle.

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Fire risk: MED

Straight from the Maine Forest Service daily wildfire danger report.

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If the loons are louder than your phone…

…you're doing it right. That's the whole idea out here.

7 Maine glamping sites

Unique lakefront stays on the way to Acadia National Park — pick your spot and book right on the calendar.

Hammock Haven Island Dome

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Floating Island Cabin (Nautilus Waterhouse)

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StarGazer Floating Dome

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Explore all seven island sites

Live availability and instant booking for every dome, cabin, and treehouse.

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Loved by 1,271 guests

Rated 4.98 out of 5 across every stay. Read what island guests are saying.

Island life

Island questions we hear a lot

What makes 1BSI different from other glamping sites?

1BSI is a non-profit, private island retreat on Annabessacook Lake focused on nature, sustainability, and simple living. We balance comfort with off-grid adventure — think hammocks, lake paddles, and firelight, not commercial resort vibes.

Do I need a boat to stay on the island?

Nope! You can arrive by canoe or kayak (gear provided), catch our seasonal ferry, bring your own boat, or even paddle yourself for a quiet crossing.

What should I expect from an island stay?

Slower days, quiet nights, and real nature — loons, stars, lake mist, and the kind of calm your phone can't interrupt. We provide the essentials; you bring curiosity and your favorite food.

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Island lore, quiet openings, and a little mischief — in short bursts, when it matters.

A non-profit island, powered by people like you

Every stay supports our mission — and you can chip in directly, too.

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Ready to plan your overnight island stay?

Bookings go fast in peak season. We'll help you pick the right spot.

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