Chased by the US Army in 1877, three Chiefs led 750 Nez Perce men, women, and children across 1,170 miles through western mountains. Their trip lasted from June to October, and this desperate and circuitous route to escape the pursuing forces is now called the Nez Perce Trail. The Trail stretches from Wallowa Lake, Oregon, to the Bear Paw Battlefield near Chinook, Montana. The trail actually bisects Yellowstone National Park and then heads north to Montana. The Nez Perce were attempting to seek refuge in Canada, but most were overtaken near the Bearpaw Mountains, just shy of the border. This trail was added by Congress as a National Historic Trail in 1986.