National Trail Mix Day is celebrated on August 31st of each year. The staff at National Whatever Day were unable to discover the origin of National Trail Mix Day.
Trail mix is a combination of dried fruit, grains, nuts, and sometimes chocolate, developed as a snack food to be taken along on outdoor hikes. Trail mix is considered an ideal snack food for hikes, because it is tasty, lightweight, easy to store, and nutritious, providing a quick boost from the carbohydrates in the dried fruit and/or granola, and sustained energy from the mono- and polyunsaturated fats in nuts.
Both Hadley Fruit Orchards and Harmony Foods (two California growers) claim that trail mix was first invented in 1968 by two California surfers who blended peanuts and raisins together for an energy snack. However, trail mix is also mentioned in Jack Kerouac’s 1958 novel The Dharma Bums as the two main characters describe their planned meals in their preparation for a hiking trip. The recipe for trail mix is most likely European in origin, where it has been known as a snack under various names (see below) in various countries since the 17th century.