Area History

ISLAND PARK – FREMONT COUNTY, IDAHO

The city of Island Park, for all other descriptive words, is “unique” in its entirety. It was incorporated in May of 1947 to meet a state law requiring businesses that serve or sell alcoholic beverages to be within incorporated towns. The city government at the time drew up the city’s boundaries to include all of the businesses that desired licenses to serve and sell alcoholic beverages from Last Chance heading north to the Montana border.  All other areas of what is now known as the Island Park Recreational area remained in Fremont County.

THE LONGEST MAIN STREET IN AMERICA

Because of this, most of the city’s “main street” is U. S. 20, a major highway lined with fine lodges, motels, restaurants, lounges, C-stores, gas stations, tackle shops and recreational vehicle and snowmobile rental businesses. And since 36.8 miles of U. S. 20 are in the city, the city of Island Park proudly boasts that it has the “Longest Main Street in America”, although its width is 500 to 5,000 feet!

Historical Sites

Largest Volcanic Caldera
Big Springs
Continental Divide
Historic Henry’s Lake
Mesa Falls
Johnny Sacks Cabin at Big Springs
Coffee Pot Rapids
Harriman State Park
Island Park Summary
Nez Perce Indians
Earthquake Lake “Quake Lake”
Island Park Reservoir
Old Union Pacific Railroad
Yellowstone National Park