Final answer:
The final mountain obstacle faced by settlers bound for Oregon Country on the Oregon Trail, after shadowing the Snake River, was the Blue Mountains.
Step-by-step explanation:
The final mountain obstacle faced by settlers bound for Oregon Country after following the Snake River was the Blue Mountains. This question refers to the journey that many settlers made on the famed Oregon Trail, a 2,000-mile long route that started in places like Independence, Missouri, and took the emigrants across the western plains and the Rocky Mountains to the valleys of Oregon, most notably the Willamette Valley.
The Oregon Trail was a part of the westward expansion and the concept of Manifest Destiny, where thousands of settlers headed to the Oregon Territory in search of fertile land, economic opportunity, and a new life. The journey faced by these settlers involved numerous hardships, including slow travel, disease, accidents, and occasionally conflicts with Native Americans, although the latter was rare compared to the myth perpetuated by Hollywood.
Nonetheless, the settlers' determination to overcome these obstacles, including mountain ranges like the Blue Mountains, symbolized the American pioneer spirit. Those who took on the Oregon Trail made significant contributions to the expansion of the United States and the idea of American growth that characterized the 19th century.