The river that flows through the national parks of the USA's Grand Teton is the Snake River. This river is crucial in shaping the landscape of the Grand Teton National Park, providing scenic views and recreational opportunities. The Snake River is also significant ecologically, supporting diverse wildlife and aquatic ecosystems within the park. Activities such as fishing, rafting, and kayaking make it a popular destination for outdoor enthusiasts. The river's path through the dramatic mountainous terrain adds to the park's stunning scenery, making it a vital feature for both natural beauty and ecological balance.