Early Bird Pricing Now Live
October 1-4, 2026
at Camp Gallagher in Lake Bay, WA
Registration Now Open — Back at Camp Gallagher for Year Two!
Join us for the only organized conference dedicated exclusively to the art and science of treehouse building. For more than 30 years, the Annual World Treehouse Conference has brought together the global treehouse community to share knowledge, exchange ideas, and build lasting connections.
After many successful years at Out’n’About Treesort in Takilma, Oregon, the conference moved to Camp Gallagher in Lakebay, Washington and 2026 marks our second year at this stunning new home. Located just 1.5 hours from Seattle-Tacoma International Airport, Camp Gallagher offers a forested, waterfront setting that feels perfectly suited to our community.
The site accommodates up to 120 attendees and provides an inspiring backdrop for hands-on learning, meaningful conversations, and reconnecting with builders from around the world. If you are bringing your children over 2 years old a kids pass is required to purchase for the event
Who Attends
The Annual World Treehouse Conference attracts an eclectic mix of enthusiasts from around the world:
Professional and amateur builders
Arborists and tree care specialists
Architects and designers
Structural engineers
Net builders and fabricators
Tree climbing professionals
Entrepreneurs and hospitality operators
Educators and environmental advocates
Whether you're a seasoned professional or a passionate hobbyist, you'll find yourself among kindred spirits who understand the unique challenges and joys of treehouse construction.
Why Attend
Share Your Projects: Showcase your latest designs and builds with an appreciative audience
Learn New Techniques: Discover safe building practices that protect both people and trees
Explore Tree Ecosystems: Deepen your understanding of the living structures that support our work
Experience New Technology: Get hands-on with state-of-the-art hardware and climbing equipment
Collaborate: Brainstorm solutions to common challenges with fellow experts
Build Community: Form lasting connections with the most passionate minds in the treehouse world
Conference Focus
In the rapidly evolving field of treehouse construction, staying connected is crucial. Our conference recognizes that treehouse building practices are innovative and constantly developing. Together, we advance the field through collective knowledge-sharing and collaboration.
What's Included
Full conference access - Thursday at 4PM through Sunday at 12PM (October 1st - 4th, 2026)
Workshops, demonstrations, and panel discussions
Saturday Night’s Keynote Speaker - TBD - followed by a special musical act.
Meals & non-alcoholic refreshments
Camping spot from Thursday evening - Sunday morning (October 1st - 4th, 2026)
Space is limited to 120 participants. Early registration is strongly recommended to secure your place.
The Kids Pass is available for children ages 2 and up attending the World Treehouse Conference with their family and includes meals and shared lodging for the duration of the event.
Please note that the World Treehouse Conference is not a children’s event. Programming is designed for adults and includes long days, technical sessions, and active outdoor environments. While children are welcome to attend with their family, childcare will not be provided, and kids must remain under the supervision of a parent or guardian at all times.
For families who do attend, kids are invited to participate in our Kids Mini Treehouse Contest, a fun, creative activity designed especially for younger builders.
What's Included
Full conference access - Thursday at 4PM through Sunday at 12PM (October 1st - 4th, 2026)
Kids Mini Treehouse Building Contest
Meals & beverages
Shared family accomodations (first come first serve to reserve a shared bunkhouse) Thursday evening - Sunday morning (October 1st - 4th, 2026)
Conference Focus:
Putting people in trees to discover new perspectives.
Explore how treehouses inspire a fresh outlook on the world and transform the way we experience nature.
Who Attends?
The Annual World Treehouse Conference attracts an eclectic mix of enthusiasts from around the world:
Professional and amateur builders
Arborists and tree care specialists
Architects and designers
Structural engineers
Net builders and fabricators
Tree climbing professionals
Entrepreneurs and hospitality operators
Educators and environmental advocates
Whether you're a seasoned professional or a passionate hobbyist, you'll find yourself among kindred spirits who understand the unique challenges and joys of treehouse construction.
Why Attend?
Share Your Projects: Showcase your latest designs and builds with an appreciative audience
Learn New Techniques: Discover safe building practices that protect both people and trees
Explore Tree Ecosystems: Deepen your understanding of the living structures that support our work
Experience New Technology: Get hands-on with state-of-the-art hardware and climbing equipment
Collaborate: Brainstorm solutions to common challenges with fellow experts
Build Community: Form lasting connections with the most passionate minds in the treehouse world
What’s Included?
Full conference access - Thursday Evening through Sunday. (October 1st - 4th, 2026)
Workshops, demonstrations, and panel discussions
Saturday Night’s Keynote Speaker - TBD
Meals & non-alcoholic refreshments
Camping spot from Thursday evening - Sunday morning (October 1st - 4th, 2026)
Space is limited to 120 participants. Early registration is strongly recommended to secure your place.
A New Chapter
Camp Gallagher in Lakebay, Washington
After many successful years at Out'n'About Treesort in Takilma, Oregon, we’re thrilled to announce that the 2026 World Treehouse Conference will be held at the breathtaking Camp Gallagher in Lakebay, Washington. Just 1.5 hours from Seattle-Tacoma Airport, this stunning venue offers a perfect blend of inspiration and tranquility. Nestled along the shores of Case Inlet in the South Puget Sound, attendees will enjoy forested trails, beachside exploration, peaceful waterside views, and even a treehouse – all while connecting with our global community of treehouse enthusiasts.
Explore Camp Gallagher
Conference Schedule
Friday
TBD
Saturday
TBD
4:00 – 6:00 PM — Keynote
6:30 PM — Dinner
Sunday
TBD
Please note: This schedule is subject to change as additional speakers, workshops, and activities are confirmed. Check back for the latest updates.
Our Sponsors
Registration Now Open
Registration Now Open
Registration Now Open — Back at Camp Gallagher for Year Two!
Join us for the only organized conference dedicated exclusively to the art and science of treehouse building. For more than 30 years, the Annual World Treehouse Conference has brought together the global treehouse community to share knowledge, exchange ideas, and build lasting connections.
After many successful years at Out’n’About Treesort in Takilma, Oregon, the conference moved to Camp Gallagher in Lakebay, Washington and 2026 marks our second year at this stunning new home. Located just 1.5 hours from Seattle-Tacoma International Airport, Camp Gallagher offers a forested, waterfront setting that feels perfectly suited to our community.
The site accommodates up to 120 attendees and provides an inspiring backdrop for hands-on learning, meaningful conversations, and reconnecting with builders from around the world. If you are bringing your children over 2 years old a kids pass is required to purchase for the event
Who Attends
The Annual World Treehouse Conference attracts an eclectic mix of enthusiasts from around the world:
Professional and amateur builders
Arborists and tree care specialists
Architects and designers
Structural engineers
Net builders and fabricators
Tree climbing professionals
Entrepreneurs and hospitality operators
Educators and environmental advocates
Whether you're a seasoned professional or a passionate hobbyist, you'll find yourself among kindred spirits who understand the unique challenges and joys of treehouse construction.
Why Attend
Share Your Projects: Showcase your latest designs and builds with an appreciative audience
Learn New Techniques: Discover safe building practices that protect both people and trees
Explore Tree Ecosystems: Deepen your understanding of the living structures that support our work
Experience New Technology: Get hands-on with state-of-the-art hardware and climbing equipment
Collaborate: Brainstorm solutions to common challenges with fellow experts
Build Community: Form lasting connections with the most passionate minds in the treehouse world
Conference Focus
In the rapidly evolving field of treehouse construction, staying connected is crucial. Our conference recognizes that treehouse building practices are innovative and constantly developing. Together, we advance the field through collective knowledge-sharing and collaboration.
What's Included
Full conference access - Thursday at 4PM through Sunday at 12PM (October 1st - 4th, 2026)
Workshops, demonstrations, and panel discussions
Saturday Night’s Keynote Speaker - TBD - followed by a special musical act.
Meals & non-alcoholic refreshments
Camping spot from Thursday evening - Sunday morning (October 1st - 4th, 2026)
Space is limited to 120 participants. Early registration is strongly recommended to secure your place.
Early Bird Pricing! World Treehouse Conference 2026 - Full Pass
Registration Now Open — Back at Camp Gallagher for Year Two!
Join us for the only organized conference dedicated exclusively to the art and science of treehouse building. For more than 30 years, the Annual World Treehouse Conference has brought together the global treehouse community to share knowledge, exchange ideas, and build lasting connections.
After many successful years at Out’n’About Treesort in Takilma, Oregon, the conference moved to Camp Gallagher in Lakebay, Washington and 2026 marks our second year at this stunning new home. Located just 1.5 hours from Seattle-Tacoma International Airport, Camp Gallagher offers a forested, waterfront setting that feels perfectly suited to our community.
The site accommodates up to 120 attendees and provides an inspiring backdrop for hands-on learning, meaningful conversations, and reconnecting with builders from around the world. If you are bringing your children over 2 years old a kids pass is required to purchase for the event
Who Attends
The Annual World Treehouse Conference attracts an eclectic mix of enthusiasts from around the world:
Professional and amateur builders
Arborists and tree care specialists
Architects and designers
Structural engineers
Net builders and fabricators
Tree climbing professionals
Entrepreneurs and hospitality operators
Educators and environmental advocates
Whether you're a seasoned professional or a passionate hobbyist, you'll find yourself among kindred spirits who understand the unique challenges and joys of treehouse construction.
Why Attend
Share Your Projects: Showcase your latest designs and builds with an appreciative audience
Learn New Techniques: Discover safe building practices that protect both people and trees
Explore Tree Ecosystems: Deepen your understanding of the living structures that support our work
Experience New Technology: Get hands-on with state-of-the-art hardware and climbing equipment
Collaborate: Brainstorm solutions to common challenges with fellow experts
Build Community: Form lasting connections with the most passionate minds in the treehouse world
Conference Focus
In the rapidly evolving field of treehouse construction, staying connected is crucial. Our conference recognizes that treehouse building practices are innovative and constantly developing. Together, we advance the field through collective knowledge-sharing and collaboration.
What's Included
Full conference access - Thursday at 4PM through Sunday at 12PM (October 1st - 4th, 2026)
Workshops, demonstrations, and panel discussions
Saturday Night’s Keynote Speaker - TBD - followed by a special musical act.
Meals & non-alcoholic refreshments
Camping spot from Thursday evening - Sunday morning (October 1st - 4th, 2026)
Space is limited to 120 participants. Early registration is strongly recommended to secure your place.
World Treehouse Conference 2026 - Kids Pass
The Kids Pass is available for children ages 2 and up attending the World Treehouse Conference with their family and includes meals and shared lodging for the duration of the event.
Please note that the World Treehouse Conference is not a children’s event. Programming is designed for adults and includes long days, technical sessions, and active outdoor environments. While children are welcome to attend with their family, childcare will not be provided, and kids must remain under the supervision of a parent or guardian at all times.
For families who do attend, kids are invited to participate in our Kids Mini Treehouse Contest, a fun, creative activity designed especially for younger builders.
What's Included
Full conference access - Thursday at 4PM through Sunday at 12PM (October 1st - 4th, 2026)
Kids Mini Treehouse Building Contest
Meals & beverages
Shared family accomodations (first come first serve to reserve a shared bunkhouse) Thursday evening - Sunday morning (October 1st - 4th, 2026)