Only the most critical government services will continue while the nation waits for Congress to approve an emergency spending bill.
Meanwhile, national parks are closing their doors.
Many popular icons closed this morning include The Statue of Liberty, The National Zoo, and The Grand Canyon.
The National Park Police in Washington say they plan to barricade the monuments there.
According to the United States National Park Service, the state of Colorado has 13 national parks. Some of these include Rocky Mountain National Park, The Great Sand Dunes, and Mesa Verde National Park.
Park officials say anyone camping in these parks already will be asked to leave.