The first free days are from January 14-16, as they correspond with Martin Luther King Jr. Day. After that things get warmer and the days increase, as it’s free-for-all during the week of April 21—that’s National Park Week. Following that, there’s no charge on June 9, September 29, or November 10, 11, and 12—thanks Veterans!
The Bureau of Land Management, the US Fish and Wildlife Service, and the US Forest Service are also getting in on the fun, so be sure to check their offerings as well. Uncle Sam has already updated his sites for 2012, so if you’re already thinking about heading out check out the full list right over here—happy trails!
[Photo: Andrew Kalat]