Load the backpack, pick the trail--we suggest Cliff Shelf Nature Trail or the more intense Saddle Pass Trail--and set out across the 240,000 acres of the otherworldly Badlands. From hulking cliffs to pristine prairies, this national park has surprises nested atop every height and stashed in each crevice. One landmark you can't miss is The Wall, South Dakota's 60-mile natural skyline of peaks and pinnacles sculpted by the elements. At the end of the day if you aren't wringing dirt out of this super-soft tee, you haven't dug in enough.

5% of sales from our National Parks Collection will benefit the National Parks Conservation Association, which, for over 100 years, has been dedicated to protecting places of unparalleled natural wonder, historical significance and cultural value.