There is NO FEE to enter Fort Union National Monument. Enjoy your visit!
If you plan to visit other parks with an entrance fee, learn more about the America the Beautiful - National Parks and Federal Recreational Land Pass and fee-free days in the national parks.
The National Park Service will offer the following FEE FREE DAYS in 2016:
January 18 – Martin Luther King, Jr. Day
April 16-24 – National Park Week
August 25-28 – National Park Service Birthday Weekend
September 24 – National Public Lands Day
November 11 – Veterans Day