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Yellowstone National Park Area

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Island Park Idaho

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

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!


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Island Park Idaho

Island Park Caldera

The volcanic feature commonly called the Island Park Caldera in the states of Idaho and Wyoming, U.S., is actually two calderas, one nested inside the other.  The Island Park Caldera is the older and much larger caldera, with approximate dimensions of 58 miles (93 km) by 40 miles (64 km). Its ashfall is the source of the Huckleberry Ridge Tuff  that is found from southern California to the Mississippi River near St. Louis. This supereruption (2500 cubic kilometers) occurred 2.1 Ma and produced 2,500 times as much ash as the 1980 Mount St. Helens eruption.

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Big Springs, Island Park, Idaho

Big Springs

Big Springs is one of the headwaters of the Snake River. Located in Island Park, Idaho, this large springs gushes forth large volumes of crystal clear water. Big Springs is known for two things. First, the large trout that are visible from the bridge. Visitors love to feed the fish. Second, for John Sack Cabin.

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Continental Divide

Approximately 36.4 miles of the Continental Divide National Scenic Trail runs through the Island Park District. Access points to the CDT Trail Are: BLACK CANYON ROAD, TARGHEE CREEK ROAD, KEG SPRINGS ROAD, AND EAST DRY CREEK ROAD. The Trails are in moderate to difficult terrain, often in the higher elevations. Some of the trail is located in situation 1 Grizzly Bear Habitat, so visitors are urged to use proper food storage and camping practices when camping in this area. Panoramic views and challenging terrain make this trail a memorable experience.

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Henry's Lake, Island Park, Idaho

Historic Henry's Lake

Henry's Lake is a 6,108 acre lake with 16.8 miles of shoreline with an average depth of 15 feet. Named after a fur trader Andrew Henry. Henry's Lake supports a world class of native cutthroat and brook trout.

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Mesa Falls, Island Park Idaho

Mesa Falls

Beginning in gently rolling farmlands, dipping into a tumultuous river confluence, and traveling over the rim of the nation's largest volcanic caldera, Mesa Falls Scenic Byway takes you through some of southeastern Idaho's most compelling scenery. In addition to enjoying breathtaking vistas along the route, devotees of intermountain recreation find countless activities to indulge their passions on the route's 27 miles. Originally a popular path to Yellowstone National Park, the byway offers plenty of reasons to justify a trip in itself.

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John Sack Cabin - Big Springs, Island Park, Idaho

John Sack Cabin

John Sack Cabin is located at Big Springs, five miles east of Mack's Inn on Highway 20 in Island Park, Idaho. The cabin can be reached via a short, paved walking path starting in the campground at Big Springs. The cabin's unique location, construction, and furnishings provide for an interesting visit.

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Coffeepot Rapids - Island Park, Idaho

Coffee Pot Rapids

Begining at the upper Coffeepot Campground this trail leads 2.5 Miles along the Henry's Fork along the Henry's Fork of the Snake River. Hikers can see placid waters of the river turn into raging rapids. Along the trails you'll see trees, bushes and flowers such as lodge pole pine and subalpine fir-Huckleberry' Snowberry and Twinberry, Glacier lilies, Geraniums and Sego Lilies.

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Harriman State Park - Island Park, Idaho

Harriman State Park

Harriman State Park lies within an 11,000-acre wildlife refuge in the greater Yellowstone Ecosystem. Moose, Elk, and Sandhill Cranes are common, as is North America's largest waterfowl, the Trumpeter Swan. Known as one of the best fly-fishing streams in the nation, the Henrys Fork meanders for eight miles through Harriman. Over 20 miles of trails are available for hiking, biking, horseback riding, and cross county skiing. Guided horseback tours are offered by a park vendor.

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Island Park, Idaho

Island Park, Idaho

ISLAND PARK is a fisherman's paradise in the summer as well as in the winter with spectacular ice fishing. Henry's lake produces 13 inch to 24 inch and occasionally 30 inch trout; cutthroat, rainbow and brook trout. Fifty percent are natural spawn. You can float with guide services or stream fish, troll with your own boat or float tube. Island Park Reservoir is very similar to Henry's lake game fish. You will see moose, elk,
bear, and even an occasional bison as you fish in the various areas available.

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Nez Perce - Island Park, Idaho

Nez Perce Indians

In June, 1877 just one year after the Custer debacle, a new and unexpected Indian outbreak flared in the west. To an American public wearied and disgusted with governmental policy, or lack of policy, that seem to breed Indian wars. This one, an uprising by formerly peaceful Nez Perce of Oregon and Idaho, was dramatized by what appeared to be superb Indian generalship.

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Earthquake Lake

Earthquake Lake "Quake Lake"

On August 17, 1959 at 11:37pm several faults in the Madison River Area moved at the same time causing an earth quake that triggered a massive landslide. The slide moved at 100 miles per hour and happened in less than one minute. Over 80 million tons of rock crashed into the narrow canyon, burying and open meadow where some campers had stopped for the night. The landslide completely blocked the Madison River and caused it to form Earthquake Lake.

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Island Park Reservoir - Island Park, Idaho

Island Park Reservoir

Island Park Reservoir is located in some of Idaho's most beautiful and unique country. This 7000 acre reservoir is on U.S. Highway 20, about 30 miles north of Ashton, and only 25 miles west of Yellowstone National Park. The reservoir was constructed in 1938 as an irrigation storage facility, and has added to the diverse fishing opportunities of the area.

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Union Pacific Railroad - Island Park, Idaho

Old Union Pacific Railroad

The historical impact of the railroad through Island Park stands out significantly as a major influence in the opening-up of tourism, lumbering, and ranching in Island Park. From 1909 to 1979, the Ashton to West Yellowstone track brought contributors of long lasting impact to the life style of the area.

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Yellowstone National Park

Yellowstone National Park

Established in 1872, Yellowstone National Park is America's first national park. Located in Wyoming, Montana and Idaho, it is home to a large variety of wildlife including grizzly bears, wolves, bison, and elk. Preserved within Yellowstone National Park are Old Faithful and a collection of the world's most extraordinary geysers and hot springs, and the Grand Canyon of the Yellowstone.

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