Island Park History
From the cataclysmic eruptions that formed the Island Park Caldera to homesteaders, railroad barons, and the quirky 33-mile main street, Island Park has one of the most unusual stories in the American West.
Articles
Johnny Sack Cabin
The handcrafted log masterpiece at Big Springs that draws thousands of visitors each summer.
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The 33-Mile Main Street
How a quirky 1947 liquor law gave Island Park the longest "main street" in America.
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Harriman Railroad Ranch
The Union Pacific president's Idaho retreat that became a state park and trumpeter swan refuge.
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Henry's Fork Fly Fishing
How a spring-fed Idaho river became one of the most legendary dry-fly waters on Earth.
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Mesa Falls
The last major undammed waterfall on the Snake River system — and the National Scenic Byway that reaches it.
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Nez Perce Trail (1877)
How Chief Joseph and 750 Nimíipuu crossed Targhee Pass into the five-year-old Yellowstone National Park.
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Railroad History & the Oregon Short Line
How the 1907–08 Yellowstone Branch built West Yellowstone, the Harriman Ranch, and the modern tourist gateway.
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The Island Park Caldera
An 18-by-23-mile supervolcano caldera — older sister of the Yellowstone Caldera — that shaped the Henry's Fork country.
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How a small 1922 log lodge on the Henry's Fork grew into one of Island Park's most beloved resort communities.
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Early Settlers of Island Park
From Andrew Henry's 1810 trapping fort to the homesteaders whose names still mark every map.
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