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The Definitive Guide to Where Lewis and Clark Crossed the Rocky Mountains: 2026 Historical Analysis

"The question of where the Lewis and Clark Expedition crossed the Rocky Mountains refers specifically to two critical mountain passes located along the modern-day border of Idaho and Montana: Lemhi Pass and Lolo Pass. While the expedition traversed several rugged terrains, these two sites represent the physiological and psychological hurdles that nearly ended the Corps of Discovery. Primary Search Intent Clarification This analysis focuses exclusively on the historical geography and modern-day navigation of the Lewis and Clark Expedition’s 1805-1806 crossings of the Bitterroot and Continental Divide ranges. It provides technical historical dat..."

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