August 25, 2015 10:06 AM EDT

If going to a national park is on your summer bucket list, Tuesday is the day to do it.

Aug. 25 marks the National Park Service’s 99th birthday and to celebrate, entrance to all of America’s 408 National Parks is free.

While not all parks charge fees, the 127 that do include some of the more popular, such as Yosemite and Yellowstone.

Other free park entrance days include Martin Luther King, Jr. Day; Presidents Day; opening weekend of National Park Week in April; National Public Lands Day in September; and Veterans Day.

More information is available here.

More Must-Read Stories From TIME

Write to Tanya Basu at

Read More From TIME
You May Also Like