One Big Sustainable Island

A non-profit organization dedicated to inspiring the naturally curious to explore, create, and enjoy.

1BSI offers...

Sustainable, off grid vacation adventures, guided tours of the island and lake, half-day, full-day, overnight and weekend retreats, events, and workshops. Vacation rental packages are now available for camp sites and the Oaktagon treehouse.
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At 1BSI...

We focus on environmental stewardship, sustainable alternatives, and a culture of health and happiness for our community. Respect for Nature's resources comes from having a sense of gratitude and caring for the gifts that surround us.

Located...

on Annabessacook Lake in Monmouth Maine, this sacred 14 acre island has been occupied for thousands of years, and is the perfect backdrop for learning how to live in modern times while remaining in touch with the natural world that makes it all possible.