Three Island Crossing State Park is located on the Snake River at Glenns Ferry. It is home to The Oregon Trail History and Education Center where visitors can learn about pioneer emigrants and Native American history. Oregon Trail pioneers knew this spot well. It was one of the most famous river crossings on the historic trail. Pioneer travelers used the three-island crossing until 1869, when Gus Glenn constructed a ferry about two miles upstream. The Glenns Ferry community sponsors a crossing commemoration the second Saturday of each August. Events often include living history presentations and historic skills fair.

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