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Camas Valley

Ecoregion in Flathead Reservation, Rocky Mountains in MT

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The treeless Camas Valley ecoregion is largely underlain by Quaternary lacustrine deposits. It is in the rainshadow of the Salish Mountains. The average annual precipitation is 12 to 16 inches and maximums are lower than those of the nearby Flathead Valley (15c). Flowing springs, hot springs, wetlands, accumulations of alkali salts, and sodium- affected soils occur locally and huge ripple marks are found in the Camas Prairie Basin. Stream density is low and much of the aquatic biota is different from surrounding ecoregions. The potential natural vegetation is foothills prairie which is distinct from the subalpine fir, Douglas- fir, grand fir, and ponderosa pine forests of the nearby Flathead Hills and Mountains (15e). Sagebrush has largely replaced bunch grass and is now common. Grazing is the prevalent land use. The land use mosaic contrasts with that of Ecoregion 15c.

— EPA

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Ecoregion