A private island on Annabessacook Lake for weddings, family reunions, retreats, or big gatherings. Sleep in whimsical stays, eat under event tents, paddle pristine water, and reset together in nature. Bring clothes, friends, off-leash pups & lots of food. We’ve got the rest: easy transport, comfy-real-beds, cooking options, hot shower & super clean, Maine Guide hospitality. All levels of nature lovers.
Helpful Guides
Fourteen acres of island, five off-grid stays, endless ways to reset.
Two event tents. Room for 50 hungry, happy humans.
Lunch, served up in the trees.
Fourteen acres. Six stays. Hot showers, sauna, swim docks, hammocks, and space to celebrate.
The Nautilus Waterhouse — not just by the water. On it.
The StarGazer - Sleep between the Lake and the Sky.
Treehouse quiet hits different.
Setting the stage for ‘I do,’ island-style.
Easy to get here. Hard to leave.
Loon Point — where loons set the schedule.
Bring your crew. Unforgettable happens naturally.
Compare all of our eco-island stays.
Wood stove warmth, dog-approved. Firewood included. *WST
Lakefront days. Beachfront wandering.
Event planning should feel less like herding cats and more like launching a small, cheerful expedition. Our event console quietly handles the guest lists, schedules, and logistics so you can focus on the part where everyone actually has a good time.
A cozy sleeping loft in the A-frame.
The island doesn’t rush sunsets.
Four toilets. Yes, they’re composting. Yes, they're nose-friendly.*TLT
Arrive by floatplane. Island bragging rights included.
Island docks for every stay. Bring a boat. Bring five.
Berry the Bass was briefly unavailable.
Every guest gets their own little command center for the adventure ahead. From ferry choices to what they’re bringing for the potluck, it’s a simple place to get organized before the island comes into view. 🌲🛶
The Hot Showah.*HSH
Reception refreshments.
Front porch. Open water.
"Naycha" up close...
A private island means leash-free heaven.*NOP
Arriving and departing are part of the adventure.*CHO
Smooth water. Paddle freedom. Sunshine included.*EXP
Hot sauna. Cold plunge. Repeat.
S’mores happen naturally here.
Gather ‘round. The fire’s on us with free firewood.*PIT
The fish like sunsets too.
Island treasure map.*IMP
Connected if you want to be. Pretending to be unplugged is also allowed.*INT
You are here. Adventure nearby.*LMP
We get all sorts of visitors.*TRT
An island wedding reception — love, laughter, lanterns.
The stars show up here.*MTR
Meet your new timekeeper.
Room to dance and celebrate. Special gatherings welcome.
Paddling gear included. Dogs welcome. Involuntary swimming possible.*BTG
Hammock docks do the work. You do the lingering.*HAM
Fish with your bestie.*FSH
Mulitiple grills means cooking inside or out. Tools included. Recipes optional.*GRL
Sometimes, the sky shows off.*NTL
Off-grid stays, done right. Tent, dome, cabin, A-frame, houseboat, treehouse — your pick.*SLP
Everything you need to cook. Bring food not gear.*KIT
Nature rewards patience. Worth the rain.
This place feels far away. It isn't.
Loon Point was named by the locals.
Guest Reviews from Revyoos — Showing 10 of 47 Reviews
⭐️⭐️⭐️⭐️⭐️ Glamping at it’s best!! Everything is provided except food, toiletries, unscreen including; Bedding Towels Games Lighting Cooking utensils, plates, mugs, pots & pans, tea kettle Gas Grill Potable water Battery charging for phones Salt & Pepper Sleeping for 4 (bed & futon) Ample seating for six Picnic table Swim platforms (one with a hammock) Spacious bohemian tent Awning Seasoned firewood pile’s available close to sight Bathrooms Ferry service (pontoon boat) to the island Free canoed, kayaks, 1 SUP, PFDs Ice packs & Most importantly; the BEST service of anyplace I’ve ever stayed in!!
The most relaxing stay on earth. Definitely try the nautilus, it’s really peaceful. A lot of effort was made so that you feel like you have a private island. Loved Kent’s energy - it’s clearly a passion project and we are so lucky to experience it. Highly recommend!
Our family of 18 recently stayed on One Big Sustainable Island for 5 days and we had such an amazing experience! Kent and Heather were so helpful and responsive. We were able to just relax, swim, eat and enjoy the island without any worries. The different camp sites were all beautiful and had everything you could need for your time in the woods. We absolutely hope to come back in the future!
I think I'm coming off the best weekend of the summer. If you need to take a break from your life/the world and reconnect with your childhood and nature, One Big Sustainable Island is a place you need to consider. Everything you need is there. If you want to be quiet, you can. If you want to be active, you can. The hosts are outstanding!!! If you like beautiful sunrises and sunsets, loons and eagles, turtles and fish, sunshine and breezes (it didn't rain while we were there, but if it did, it wouldn't have a negative impact). The spirit of the island is warm and welcoming for ALL.
We had a team of 15 cyclists who rode bikes from Florida to Maine over a five week period along the East Coast Greenway and we needed “a vacation” for one day & night and 1BSI was the “perfect retreat” site and the co-hosts are wonderful, kind & loving people. <br/>No one should not come to this place if they want the creature comforts and microwave amenities of 21st century life because this place & space is a dream getaway for anyone who wants peace & love with another Nature❤️
My husband and I decided to honeymoon to this lovely get-away in Maine and it did NOT disappoint!! We stayed in the new Nautilus Floating House and it was a dream to wake up to breathtaking views from our bed every morning. Hiking, swimming, and canoeing filled our day with fun. Kent and Heather were amazing hosts that made sure our stay was top notch. If you’re looking for a peaceful, beautiful, vacation, you’ve found it!!
This tiny island is the perfect place to take a break from the real world, disconnect, and connect with nature. Everything is exactly as advertised: the amenities, canoes, kayaks, shower. Kent was so helpful and brought fresh ice packs for our coolers, battery packs to charge our devices.. he’s a great host. The water around the island is shallow, our dogs loved walking around splashing in it. The ferry ride is easy and they have wheelbarrows to help load your stuff from the car to the ferry. We had the best time. I suggest bringing a lot of reading material so you can hang out on the hammock (one outside, one inside). There is a grill, a fire pit, rocking chairs. If you want to shower, you can pump the water for a few minutes and then clean up. We were so pleased with our stay that we will definitely be back! Thank you, Kent!
Kent made the process of getting to the and from the island extremely easy, from the wheelbarrows being pulled to and from our cabins, to the scenic boat ride over. He was extremely helpful with late guest arrivals, and with the firewood and ice packs. He was able to give you and your group the privacy you wanted while maintaining a very attentive and helpful experience. Will be going back.
1 Big Sustainable Island is an experience like no other. As long as you go into it understanding you are going to be essentially camping on an island, the stay is immaculate. Kent was amazing, responsive and beyond helpful. He's an expert and takes pride in what he does. We had a large group on the island and loved every minute of it. If you want a memorable time, come to the island!
Events: Weddings, Families, Retreats (whole island) - FAQs
Can 1BSI host weddings and large group events?
Yes! Our island has hosted weddings, team retreats, training workshops, and multi-day gatherings with logistics support.
What group sizes can you accommodate?
We've supported groups as small as 10 and as large as 85 for retreats, ceremonies, and corporate events.
Is event catering and vendor support available?
We can assist with coordinating caterers, stylists, and other vendors - just ask us as you're planning.
Ready to plan your overnight island stay?
Bookings go fast in peak season. We'll help you pick the right spot.
