An estimated 3,500 Mainers will take red-eye buses, carpool, or fly to Washington, D.C., for the Saturday, January 21, Women’s March on Washington on the day after Donald Trump is sworn in as the 45th president of the United States.

Maine marchers will be joining what organizers estimate will be 250,000 to 400,000 people for a rally near the Capitol to protest Trump’s proposed policies that they say will target women and minorities. Attendance is predicted to be the largest in inauguration history. 

In recent days, environmental groups including the Sierra Club and progressive citizen action groups such as MoveOn.org have signed on as formal partners, broadening the protest to include people with a wide range of interests — from access to affordable health care to climate change.