Which decade saw the peak of emigration along the Oregon Trail? 1820s 1840s 1860s 1880s None What was the primary motivation for pioneers traveling the Oregon Trail? Gold Rush Manifest Destiny Fur Trade Religious Freedom None Which river was a significant obstacle for pioneers on the Oregon Trail? Mississippi River Colorado River Columbia River Missouri River None What invention significantly facilitated travel to the American West? Model T Conestoga Wagon Telegraph Transcontinental Railroad None Which famous landmark served as a guiding point for pioneers on the Oregon Trail? Grand Canyon Mount Rushmore Independence Rock Old Faithful None Time's up