This intriguing waterfall is between Idaho Falls and Grand Teton National Park.  The river you see is the Snake River, and this tiny waterfall is one of the jewels that make up the grandeur of the Snake River.  It's hard to find this falls, easy to miss.  The sign is small and easy to miss as you speed along route 26 toward the Tetons.  Look for it.  It's worth driving back the dirt road to find it.