Protected areas of Multnomah County, Oregon National scenic areas Protected areas of Sherman County, Oregon Protected areas of Skamania County, Washington Protected areas of Wasco County, Oregon Mount Hood National Forest Landforms of Clark County, Washington Landforms of Hood River County, Oregon Landforms of Klickitat County, Washington Landforms of Multnomah County, Oregon Landforms of Sherman County, Oregon Landforms of Skamania County, Washington Landforms of Wasco County, Oregon United States Forest Service protected areas Water gaps of Washington Water gaps of the United States