The Snake River Mountains form the northern boundary of the Great Basin, near the Snake River Plain in Idaho.

The Snake River Mountains, located in southern Idaho, define the northern edge of the Great Basin. These rugged mountains are part of the Basin and Range Province, a region characterized by alternating mountain ranges and valleys. Their proximity to the Snake River Plain highlights a transition zone between the arid Great Basin and the more temperate regions of the Pacific Northwest. The mountains influence local climate patterns by acting as a barrier, enhancing the aridity of the Great Basin. This area is notable for its geological diversity and its role in shaping the surrounding ecosystems.