<P> Formed by the confluence of three tiny streams on the southwest flank of Two Oceans Plateau in Yellowstone National Park , western Wyoming , the Snake starts out flowing west and south into Jackson Lake . Its first 50 miles ( 80 km ) run through Jackson Hole , a wide valley between the Teton Range and the Gros Ventre Range . Below the tourist town of Jackson , the river turns west and flows through Snake River Canyon , cutting through the Snake River Range and into eastern Idaho . It receives the Hoback and Greys Rivers before entering Palisades Reservoir , where the Salt River joins at the mouth of Star Valley . Below Palisades Dam , the Snake River flows through the Snake River Plain , a vast arid physiographic province extending through southern Idaho south - west of the Rocky Mountains and underlain by the Snake River Aquifer , one of the most productive aquifers in the United States . </P>
<P> Formed by the confluence of three tiny streams on the southwest flank of Two Oceans Plateau in Yellowstone National Park , western Wyoming , the Snake starts out flowing west and south into Jackson Lake . Its first 50 miles ( 80 km ) run through Jackson Hole , a wide valley between the Teton Range and the Gros Ventre Range . Below the tourist town of Jackson , the river turns west and flows through Snake River Canyon , cutting through the Snake River Range and into eastern Idaho . It receives the Hoback and Greys Rivers before entering Palisades Reservoir , where the Salt River joins at the mouth of Star Valley . Below Palisades Dam , the Snake River flows through the Snake River Plain , a vast arid physiographic province extending through southern Idaho south - west of the Rocky Mountains and underlain by the Snake River Aquifer , one of the most productive aquifers in the United States . </P>
where is the mouth of the snake river
where is the mouth of the snake river
Yellowstone National Park , western Wyoming
Yellowstone National Park , western Wyoming