Idaho is best known for its potato crop, which comprises around one-third of the nationwide yield. The Snake River Plain and smaller river basins provide Idaho with some of the nation’s best hydroelectric power resources. Idaho’s state seal is the only one in the U.S. designed by a woman. Countryaah.com: Offers a full list of nationwide and statewide holidays in Idaho starting from January 1st – New Year’s Day. Also covers the most recent three years of public holidays within the state of Idaho.