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The Bureau of Land Management manages 517 wilderness study areas containing about 12.6 million acres located in the Western States and Alaska. The Federal Land Policy and Management Act of 1976 directed the Bureau to inventory and study its roadless areas for wilderness characteristics. To be designated as a Wilderness Study Area, an area had to have the following characteristics:

Size - roadless areas of at least 5,000 acres of public lands or of a manageable size; Naturalness - generally appears to have been affected primarily by the forces of nature; Opportunities - provides outstanding opportunities for solitude or primitive and unconfined types of recreation.

In addition, Wilderness Study Areas often have special qualities such as ecological, geological, educational, historical, scientific and scenic values.

The congressionally directed inventory and study of BLM's roadless areas received extensive public input and participation. By November 1980, the BLM had completed field inventories and designated about 25 million acres of wilderness study areas. Since 1980, Congress has reviewed some of these areas and has designated some as wilderness and released others for non-wilderness uses. Until Congress makes a final determination on a wilderness study area, the BLM manages these areas to preserve their suitability for designation as wilderness.

In Oregon/Washington there are 83 wilderness study areas comprising 2,642,289 acres. These 83 wilderness study areas are primarily located in southeast Oregon in the Prineville, Lakeview, Burns and Vale Districts.