[6] The peak's toponym was officially adopted February 4, 1931, by the United States Board on Geographic Names.

[3] On August 6, 1948, George M. Roest (age 18) a park concessioner’s employee, fell to his death while climbing alone on Applegate Peak.

[8] Most weather fronts originate in the Pacific Ocean, and travel east toward the Cascades where they are forced upward by the range (Orographic lift), causing them to drop their moisture in the form of rain or snowfall.

In the Crater Lake area, winter lasts eight months with an average snowfall of 41 feet (12.5 m) per year.

Applegate Peak was created when Mount Mazama, a large stratovolcano erupted violently approximately 7,700 years ago and formed on the caldera rim.