Vegetation Zones of Washington State

Large zone map

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The vegetation zones within these ecoregions are further distinguised by soils, rainfall, fire history, elevation, aspect (i.e., if the landform is facing north, south, etc.) and slope (i.e. flat, a steep slope, etc.).

The Ponderosa Pine vegetation zone (bright purple) is where the dominant vegetation is Ponderosa Pine forests. These forests are found along the edges of the following ecoregions: Columbia Basin, Southeast, Central and Northeast Cascades, Okanogan, Northeast corner and the Blue Mountains.

The Vegetation Zones are: