The Fort Henry Historic Byway passes through northeastern Idaho landscapes and historic sites tied to the Nez Perce War, mining, settlement, transportation, and local industry. Along this route, Camas Meadows was the scene of an August 19, 1877 encounter in which Nez Perce warriors raided General Oliver O. Howard's camp, captured 200 mules and horses, and fought pursuing soldiers near lava ridges and rifle pits that remain visible. The byway also includes the Spencer Opal Mine, discovered when two hunters found opal nodules on the Continental Divide; the Spencer Rock House, a substantial field-stone home associated with the Wood Live Stock Co. Limited; the Clark County Civil Defense Cave, a long lava tube used over time by animals and people; the St. Anthony Sand Dunes, an extensive shifting dune field; the Fremont County Sugar Company slicer, which operated from 1904 to 1914 processing sugar beets; and the Fort Henry Monument, recalling Andrew Henry's expedition of 1810 and 1811 and Wilson Price Hunt's naming of Fort Henry and Henry's Fork. The surrounding region also served as a corridor for the Idaho Gold Rush, the Nez Perce Trail, the Utah and Northern Railroad, and later opal hunting near Spencer. The Nez Perce story in this region grew from treaty conflict after 1863, pressure from settlers and gold seekers, and the 1877 flight of more than 800 Nez Perce under leaders including White Bird, Joseph, Looking Glass, and Toohoolhoolzote, pursued by the U.S. Army on a long route toward Canada before their surrender near the border and the survivors' exile to Kansas and Oklahoma before some returned in 1885.