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Klamath River Ridges

Ecoregion in Coast Ranges, Klamath Mountains in CA, OR

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The Klamath River Ridges ecoregion has a dry, continental climate and receives about 25–35 inches of precipitation annually. Higher altitudes and north-facing slopes have Douglas-fir and white fir; lower elevations and south-facing slopes are mostly ponderosa pine and western juniper, species that are more drought-resistant than other vegetation types found in Ecoregion 78. Some Oregon white oak occurs, and canyon live oak can grow on steep rocky slopes. Ecoregion 78g has less precipitation, more sunny days, and a greater number of cold, clear nights than the Inland Siskiyous ecoregion (78e) to the northwest in Oregon or the western Klamath Mountains in California. Mesic soil temperatures and xeric soil moisture regimes predominate.

— EPA

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Ecoregion