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Tobacco Root Mountains

Ecoregion in Rocky Mountains, MT

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The glaciated, forested Tobacco Root Mountains ecoregion is characterized by a Tertiary granitic core and is geographically isolated from neighboring mountainous ecoregions. Ecoregion 17z is steeper and more rugged than the Elkhorn Mountains-Boulder Batholith (17ai) and its core is lithologically distinct from the Gneissic-Schistose Forested Mountains (17l). Average annual precipitation ranges from about 16 to 40 inches which is greater than for Ecoregion 17ai. The climax vegetation is mapped as subalpine fir and Douglas- fir. Logging, grazing, mining, and recreation are the primary land uses.

— EPA

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Ecoregion