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Oregon's Forest Atlas 2010 online edition
Oregon Forestland Historic Vegetation circa 1850
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Oregon’s forest vegetation is constantly changing as a result of vegetation growth or decay, and natural disturbances such and insects and disease, fire, windstorms, floods, volcanic eruptions, and climate change.
Human alteration of Oregon’s forest predates European settlement, but has increased significantly over the past 150+ years of Oregon statehood. Science does not prescribe a “right” pattern of forest vegetation, but information about the condition of Oregon’s forests in the 19th Century can inform forest management and forest policies today.

Map for download and viewing
Map showing historic vegetation patterns within Oregon circa 1850
This map depicts Oregon’s forest and vegetation coverage as it likely appeared in 1850 based on historic documentation and research.
JPG version of the map - ( 2 Mb file)
Source: Northwest Wildlife Institute, Corvallis Oregon
Data description for this map 

Important information about Forest Atlas map products
Data for the Forest Atlas was compiled by staff with the Oregon Department of Forestry in 2010 using data generated by the U.S. Forest Service PNW Research Station in Corvallis, Oregon State University and the Oregon Department of Forestry.
This product is for informational purposes, and may not be suitable for legal, engineering or surveying purposes. This information or data is provided with the understanding that conclusions drawn from such information are the responsibility of the user.

Data contained within the map products does not necessarily reflect conditions at a fine-detail level.  Some data models rely on site information at least one year old. All information published herein is gathered from sources which are thought to be reliable, but the reader should not assume that the information is official or final, especially for the purposes of land use determination. The Oregon Department of Forestry does not assume responsibility for errors, and all research information contained within the website is subject to change without notice.
Additional information is contained in the liability notice 

Oregon's Forest Atlas main page 
2010 Forest Assessment and Resource Strategy project information 
Additional questions about the Forest Atlas can be addressed to the ODF Agency Affairs Office