More than 1,000 people, including families and children, are gathered at the Dakota Access pipeline protest site in North Dakota.
They're awaiting a critical ruling from a federal judge on the Standing Rock Sioux tribe's request to block the $3.8 billion pipeline over environmental concerns.
Judith LeBlanc is director of the New York-based Native Organizers Alliance. She said Friday that it's an historic coming together of tribes - probably the largest such gathering of Native Americans in a century.
People have come from as far as New York and Alaska, as well as Canada.
Kate Silvertooth made the daylong drive from Colorado on Thursday, spending hundreds of dollars on supplies such as tarps and food. She says she "felt moved" to help the protesters.
The pipeline, being built by a Texas-based company, is to carry oil from western North Dakota to Illinois.