One hundred years ago, in June 1913, one of the pioneering feats of human physical endurance occurred when four men became the first to reach the summit of Alaska’s Denali/Mount McKinley — the highest peak in North America. Among them was a 21-year-old Knoxvillian named Robert G. Tatum. Tatum later donated his Denali diary and other papers to the UT Libraries. The UT Libraries staff have turned the diary into a digital collection. The News Sentinel featured the collection and Tatum’s story in this article.