"Water protectors" set up a tipi in front of Donald Trump's D.C. hotel.
Native Nations and allies marched through D.C. to protest the Dakota Access Pipeline.
This week, a judge denied a request to halt the pipeline.
But the fight against the pipeline isn't over.
The $3.8 billion project is supposed to cross the Missouri River less than a mile from the Standing Rock Reservation.
The pipeline company has been drilling under Lake Oahe for weeks.
Oil could flow through the pipeline next week.