Snake River: Check its Map, History, and Length

Jul 10, 2025, 10:51 EDT

The Snake River is a 1,670-kilometre tributary of the Columbia. It flows from Wyoming's Rockies through Idaho, Oregon, and Washington in the United States. Some of the biggest salmon and other anadromous fish runs in North America used to occur in the Snake River. Moreover, its history includes Native American life, Lewis and Clark's exploration, and its role on the Oregon Trail for westward pioneers. In this article, learn about where it is located, its history, map, length, and key facts. 

An iconic waterway of the Pacific Northwest, the Snake River is famous for its stunning canyons and also for its relevance to the surrounding ecology and history. This is the largest tributary of the Columbia River. It is very famous for Hells Canyon, North America's deepest gorge. So, there are numerous dams and volcanic landscapes on the river. Even so, it remains crucial to the region's water, electricity, and wildlife. Learn about the Snake River's path across the landscape, its history, and some interesting facts about its incredible length and characteristics in this article.

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Where is the Snake River Located on the Map?

The Snake River begins high in the Rocky Mountains in northwestern Wyoming, near the southeastern corner of Yellowstone National Park. From its source, it flows south through Jackson Lake and then turns northwest, entering Idaho. It crosses the broad Snake River Plain in southern Idaho, an area known for its lava beds.

As it continues its journey, the Snake River forms part of the border between Idaho and Oregon for 216 miles (348 km). It then forms a section of the Washington-Idaho boundary before turning west to join the Columbia River in Washington. A vital source of water for the area, its extensive drainage basin gathers water from Wyoming, Utah, Nevada, Idaho, Oregon, and Washington.

What is the History of the Snake River?

The history of the American West is deeply connected with the history of the Snake River as native American tribes like the Shoshone and Nez Perce for thousands of years as they lived along its banks. Furthermore, parts of the Snake River were crossed by early European fur traders and explorers in the early 1800s, including the famous Lewis and Clark expedition.

The Snake River later played a vital role in the Oregon Trail, which provided a route for 19th-century pioneers travelling west. In order to travel and build new communities in the fertile Pacific Northwest, many settlers used its waters. As a result, the river became a vital conduit for westward migration and a site of important historical occurrences.

What is the Length of the Snake River?

The Snake River stretches approximately 1,670 kilometres (1,040 miles), making it one of the longest rivers in the United States. It descends significantly from its mountain origins to its confluence with the Columbia River.

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Key Facts About Snake River

Here are some key facts about the Snake River:

  • The river flows through Hells Canyon in North America and this impressive canyon is over 1.6 kilometres deep in places and forms part of the Idaho-Oregon border.

  • Numerous dams have been built along the Snake River for irrigation, hydroelectric power generation, and navigation. They have also impacted fish migration, especially for salmon.

  • The Snake River Plain, through which the river flows in Idaho, is a vast area covered by ancient lava beds, a result of volcanic activity.

  • The river and its surrounding areas are home to diverse wildlife, including various fish species like sturgeon, salmon, and trout, as well as beavers, otters, and numerous bird species.

The Snake River is a powerful and iconic natural feature, deeply woven into the fabric of the American West's history, geography, and ongoing development.


Manvi Upadhyaya
Manvi Upadhyaya

Content Writer

    Manvi Upadhyaya is an experienced content writer who is passionate about creating authentic content by delivering credible facts to people. She holds a degree in Journalism and Mass Communication and is fond of art, languages, culture, and education. She has been a published co-author and compiler for many anthology book projects. She creates educational and informative content for international audiences. You can reach out to her at manvi.upadhyaya@jagrannewmedia.com

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    FAQs

    • What are the main environmental concerns facing the Snake River, particularly regarding its salmon populations? 
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      Major concerns include the impact of dams blocking salmon migration, water quality degradation from runoff, and rising water temperatures due to climate change.
    • What are some of the key roles the Snake River plays in the region? 
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      It's vital for hydroelectric power, agricultural irrigation, recreation (rafting, fishing), and wildlife habitat (especially salmon).
    • Where does the Snake River originate, and what states does it flow through? 
      +
      It originates in Yellowstone National Park, Wyoming, and flows through Idaho, Oregon, and Washington before joining the Columbia River.

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