Ice Age Floods National Geologic Trail was created in 2009.
National Trail High School was created in 1968.
Nez Perce National Historic Trail was created in 1986.
Ala Kahakai National Historic Trail was created in 2000.
Row River National Recreation Trail was created in 1998.
Lost Trail National Wildlife Refuge was created on 1999-08-24.
Star-Spangled Banner National Historic Trail was created on 2008-05-08.
Captain John Smith Chesapeake National Historic Trail was created on 2006-12-19.
El Camino Real de los Tejas National Historic Trail was created in 2004.
You cannot find in any literature who came up with National Trail Mix Day, and although it's listed as a "National" holiday, it is not in any of the Congressional or Presidential records.
While there are no National Parks in Nebraska, there are five National Historic Trails (California National Historic Trail, Lewis and Clark National Historic Trail, Mormon Pioneer National Historic Trail, Oregon National Historic Trail, and Pony Express National Historic Trail). Also, there are three National Monuments (Agate Fossil Beds National Monument, Homestead National Monument of America, and Scotts Bluff National Monument), and one National Scenic River (Nebraska National Scenic River).
Hellhound on My Trail was created on 1937-06-20.
Three on the Trail was created in 1980.