July 18, 1967 - Mountaineering Fatality at Denali
In what's known as the 1967 Mount McKinley disaster Jerry Clark (age 31), Steve Taylor (age 22), Dennis Luchterhand (age 24), Mark McLaughlin (age 23), Anshel Schiff (age 30), Hank Janes (age 25), John Russell (age 23) died when severe storm hit Denali. Believed to be the worst storm in the mountains climbing history, models have estimated that high regions of the mountain were hit with gusts of up to 300mph.
Their deaths have been said to be a result of bad weather, inexperience, and poor decision making. Five other members of the party, four of which summited, descended to camp at 15,000ft survived.
There are two books written by the party leaders. Joe Wilcox wrote "White Winds: America's Most Tragic Climb," while Howard Snyder wrote "The Hall of the Mountain King." Andy Hall whose father was the superintendent of Denali National Park at the time wrote "Denali's Howl: The Deadliest Climbing Disaster on America's Wildest Peak."
You can also read the Wikipedia article.