Yellowstone National Park is joining all National Park Service sites across the country on Monday, January 20, 2014 and offering FREE admission in observance of the Martin Luther King, Jr. federal holiday.

The entrance fee to Yellowstone (along with the other 400 U.S. National Parks) will be waived on January 20. You gotta love free days at the park! Mark your calender now for all 2014 entrance fee-free dates.