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Rattlesnake-Blackfoot-South Swan-Northern Garnet-Sapphire Mountains

Ecoregion in Rocky Mountains, MT

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The Rattlesnake-Blackfoot-South Swan-Northern Garnet-Sapphire Mountains ecoregion is forested and lies west of the Continental Divide. Ecoregion 17x is underlain primarily by a heterogeneous mixture of Precambrian Belt formations but Tertiary-Cretaceous igneous rocks also occur. Overall, it is lithologically distinct from the Eastern Pioneer Sedimentary Mountains (17ah), Southern Garnet Sedimentary-Volcanic Mountains (17al), and the mixed rock of the neighboring Flint Creek-Anaconda Mountains (17am). The climax vegetation is mapped as subalpine fir, Douglas-fir, and ponderosa pine forests and is distinct from Ecoregions 15a, 17aj, 17am, 17p, and 41. The forests of Ecoregion 17x tend to be drier than the ecoregions to the northwest and west but are wetter than those to the east of the Continental Divide. They are used for logging and recreation.

— EPA

Plants

Thimbleberries Rubus parviflorus (species), “Western Thimbleberry”, “Snow Bramble”

Rattlesnake-Blackfoot-South Swan-Northern Garnet-Sapphire Mountains

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