In photos: 100 years of Denali National Park

Many know Denali as the tallest peak in North America—it's the 20,310-foot behemoth formally known as Mount McKinley—but the name also belongs to the surrounding 6-million-acre Alaskan preserve. This land—arguably one of the most wild, dazzling treasures of the National Parks System—is celebrating the big 1-0-0 this year, and in its honor we've scoured government sites for archival shots. Read on.