(Encyclopedia) Oregon Trail, overland emigrant route in the United States from the Missouri River to the Columbia River country (all of which was then called Oregon). The pioneers by wagon train did? (Encyclopedia) Stuart, Robert, 1785?1843, American explorer, b. Scotland. He emigrated (1807) to Canada and became a fur trader. He joined in John Jacob Astor's Astoria venture, and in 1812 he? (Encyclopedia) South Pass, broad, level valley (alt. c.7,550 ft/2,301 m), SW Wyo., cutting across the Rocky Mts. It was used by trappers and explorers before Jedediah Smith inaugurated its use as a? (Encyclopedia) Caldwell, city (1990 pop. 18,400), seat of Canyon co., SW Idaho, on the Boise River; inc. 1890. On the site of an Oregon Trail camping ground, the city is a major processing and? (Encyclopedia) Fort Bridger State Park, on Blacks Fork of the Green River, SW Wyo. The supply post, founded by U.S. fur trader James Bridger in 1843, was an important station on the Oregon Trail. The? (Encyclopedia) Fort Hall, trading post on the Snake River, near Pocatello, SE Idaho; est. 1834 by U.S. trader Nathaniel Wyeth. It was sold in 1836 to the Hudson's Bay Company, which occupied the? (Encyclopedia) Beatrice b??tr?s, city (1990 pop. 12,354), seat of Gage co., SE Nebr., on the Big Blue River; inc. as a city 1873. On the old Oregon Trail, it is the trading and industrial center for? (Encyclopedia) Wind River Range, part of the Rocky Mts., W Wyo., running southeastward c.120 mi (190 km) and constituting part of the Continental Divide. Gannett Peak (13,804 ft/4,207 m) is the? (Encyclopedia) Blue Mountains, uplifted, eroded part of the Columbia Plateau, c.6,500 ft (1,980 m) high, NE Oreg. and SE Wash. Lava flows cover much of the surface. The upper, wooded slopes are used? (Encyclopedia) Parkman, Francis, 1823?93, American historian, b. Boston. In 1846, Parkman started a journey along the Oregon Trail to improve his health and study the Native Americans. On his return?