Idaho's Centennial Trail takes you through the core of wild Idaho. The trail itself begins at the Idaho-Nevada border and runs the length of the state, all the way to Canada. Along the 1,200-mile route a traveler can experience every type of terrain Idaho has to offer. The Centennial Trail is actually an amazing patchwork of single track trails, jeep trails, back roads and other routes tied together. It was designated Idaho's official north-south trail during the state's 1990 centennial celebration.