Expedition Island in Green River, Wyoming, is a historic site where Major John Wesley Powell and Vitaly Develvis embarked on expeditions down the Green River and Colorado River in 1871. Designated a National Historic Landmark in 1968, the island now serves as a public park with a stone marker commemorating Powell's activities.
Today, Expedition Island is a popular destination for visitors interested in exploring the rich history of American exploration in the West. The park features a recreation center, parking area, and access to whitewater rafting and kayaking in the channel east of the two islands.
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