Vanishing Falls, is a waterfall located on the Salmon River at the south skirt of the Mount Hood National Forest, in Clackamas County, in the U.S. state of Oregon. It is located in a privileged area where the river creates several waterfalls: Final Falls, Frustration Falls, Little Niagara Falls, and Copper Creek Falls are within a mile from Vanishing Falls; while Hide…Vanishing Falls, is a waterfall located on the Salmon River at the south skirt of the Mount Hood National Forest, in Clackamas County, in the U.S. state of Oregon. It is located in a privileged area where the river creates several waterfalls: Final Falls, Frustration Falls, Little Niagara Falls, and Copper Creek Falls are within a mile from Vanishing Falls; while Hideaway Falls, Split Falls, and Stein Falls are approximately two miles away.