This river rises in Yellowstone National Park, flows through  Jackson Lake in Grand Teton National Park, and westward into Idaho.  
This river rises in Yellowstone National Park, flows through  Jackson Lake in Grand Teton National Park, and westward into Idaho.  Despite its many dams, its scenic beauty remains in the Twin,  American, and Shoshone Falls, and Hells Canyon, the deepest river  gorge in North America. FTP, name this important Western river  that forms the part of Oregon-Idaho border, and joins the Columbia  near Pasco, Washington.
This river rises in Yellowstone National Park, flows through  Jackson Lake in Grand Teton National Park, and westward into Idaho.  
{Snake} River