Ephemerisle is a floating celebration of community, learning, art and seasteading.

We construct a floating city on the Sacramento River Delta and live on it for five days. Ephemerisle has elements of Burning Man in the early 1990s: a new adventure into an alien environment, with discoveries, adventures, and mishaps along the way.

There are no tickets, no central organizers, and no rangers to keep you safe.


Seasteading seeks to move human communities out into the vast expanse of our planet covered in water. Ephemerisle gives an introduction into the physical challenges of being water and learning ways to deal with them. It also provides for small scale experimentation in differing forms of governance.


A society without art has no soul. We need to have art, beauty, and creativity in our lives.


We thrive off of sharing knowledge and learning from one another. “Memocracy” micro-talks have been a core of the event. Ephemerislers are now teaching clinics in anchoring and other boating skills. Learning by doing is also key.


Ephemerisle is an event that doesn’t happen unless we build it together. Everyone should be contributing.

Never board a boat without asking first as according to the ancient laws of the sea, each captain is sovereign over his vessel. But the default assumption at this event is that you will be welcomed aboard.

Ephemerisle 2014 - July 14-20

Again, there were two islands, with speedboat and jet ski service gracefully provided by several kind folks, especially Randolph Hencked of The Seasteading Institute.

For pics, check out the fantastic Ephemerisle 2014 album by Judd Weiss.

Ephemerisle 2013 - July 10-14

Try searching tweets with hashtag #ephemerisle, and looking for tagged photos on the Facebook group.

Here’s the location: http://tinyurl.com/kmnw6ur

In 2013, Ephemerisle reached a size where it made sense to break into autonomous Islands for logistical and other reasons. Now the event needs more boats, preferably art boats, to move between these islands.

In 2013, the Ephemerisle community broke up into fully autonomous islands. It would greatly add to the sense of community and help communication if you add your islands to the list of 2013 Islands.

The main discussion is on the facebook group and the 2013 event is here.

The water can be very dangerous. Read the Survival guide!

Get involved

Join the Facebook Group and the Mailing Lists, or chat on IRC (http://webchat.freenode.net/?channels=ephemerisle).

New to Ephemerisle, have questions, but don’t know anyone in the community? E-mail ephemerisle.questions@gmail.com! It’s an open, shared e-mail account where Ephemerisle vets interested in being helpful can see your message and hopefully answer your questions. Not everyone involved in the event is interested in having e-mail queries directed their way, so this system helps ensure that you’re sending your question to someone who wants to read it.

Help schedule, plan, or attend any of these other Upcoming Events. (List not kept up to date… check Facebook group as well)

Build an Art Project.

Check out the Guidebook for a listing of scheduled Art, Music, Classes, and Events.

Don’t know where to start? Learn the Basics.

Meeting Notes from planning meetings.

Rideshares, boatshares, and more.

Going forward as the population grows and the city divides into Islands, a clearly defined culture may be the only things that keeps us united. Help define our Culture here.