In observance of the Martin Luther King Junior holiday, Yellowstone National Park will have free admission into the park this Saturday, January 14th through this Monday, January 15th for all vehicles at all operating entrances.
As part of a nationwide initiative, Yellowstone joins all other U. S. National Parks in waiving park entrance fees.
Although Yellowstone is currently converted for over-snow travel, guests will be able to have waived fees regardless of mode of entry to the park. Normally non-commercial entry passes for both Yellowstone and Grand Teton National Park are $25 per vehicle.
Other "Fee Free Days" for 2012 include National Park Week (April 21 through 29), Get Outdoors Day (June 9), National Public Lands Day (September 29), and Veterans Day weekend (November 10 through 12). More information on the Department of the Interior's "Fee Free Days" can be found here.
While winter travel is still limited throughout the park in the winter months, many roads and points are still accessible. More information on Yellowstone winter operations can be found here.