Lower Mesa Falls

Island Park is a city in Fremont County, Idaho, United States. The city's population was 215 at the 2000 census. The city was incorporated by owners of the many lodges and resorts along U.S. Route 20 in 1947 to circumvent Idaho's liquor laws that prohibited the sale of liquor outside of city limits. It is only 500 feet wide in most locations and, at 33 miles claims to have the longest "Main Street" in the world.

From the northern area of Island Park, where Henry’s Lake awaits the trophy trout angler, to the southern area, where there’s Blue Ribbon fly fishing on the Henry’s Fork, Island Park is a rear-round recreation paradise. The Island Park Caldera (volcano cone) is one of the largest calderas in the world. It has a nearly level 20-mile wide circular floor that slopes slightly towards the southeast. The caldera floor is at about 6,000 feet of elevation with the rim generally being several hundred feet higher. The Henry's Lake Flat area, north of the caldera, is a little higher. Henry's Lake is at 6,500 feet with the flats sloping slightly southward towards the caldera.

Upper Mesa Falls, Island Park Idaho

The area sports two Idaho state parks — Henry’s Lake and Harriman, and is surrounded by the Caribou-Targhee National Forest, where you can hike, mountain bike, ride ATV’s, fish, boat, bird watch, do nature photography, and much more.

Island Park Idaho is In the heart of Targhee National Forest, whether you are interested in historical landmarks, fly fishing, hiking, camping horseback riding, hunting, snowmobiling or just on your way through to Yellowstone National Park, Island Park’s natural splendor will captivate you.

Harriman State Park, 4,330 acres of pristine forest land and high-country meadows. Located in the center of a 16,000-acre wildlife refuge, the park is a haven to rare trumpeter swans, numerous waterfowl and elk, deer and other wildlife.

Fly-fisherman, Henry's Fork River, Last Chance Idaho

The world famous fly-fishing stream, the Henry's Fork of the Snake River, winds through the meadows at the park. The Henry's Fork is one of the most famous trout streams in all of the United States. It's legendary hatches and abundant large wild rainbow trout make the Henry's Fork one of America's top fly-fishing destinations. The river flows for approximately 150 miles and within its journey passes some of the more classic dry fly water in the United States. Gentle flowing meadowland, pocket water, and spring creek like sections make up much of this legendary fishery made popular by Avril Harriman the railroad man. The Henry's Fork of the Snake is a spectacular river and fishery. Anglers come from all over the world to this river to fish its diverse and productive waters. 

Snowmobiling is big business and big fun in Island Park in Winter.

Snowmobiling is big business and big fun in Island Park in Winter and it’s a snowmobiler’s winter wonderland where you can escape to prodigious hordes of powder and hundreds of miles of groomed trail; horizons of snow-capped peaks beckon, powder blanketed valleys of white entice you off your groomed trail, and breathtaking scenery stops you in your tracks. Each Winter Island Park is the beneficiary of average of 229 inches of snow. Hundreds of thousands of acres of public land are open to snowmobiling and exploring.

Island Park maintains over six hundred miles of groomed snowmobile trails with four full time groomers operating daily to insure smooth riding for the Island Park snowmobiler await both novices and experienced riders alike. Snowmobile in our back yard with fewer restrictions, ride in the shadow of the majestic Tetons Mountains, or play in the hills and meadows within an hour’s drive of our front door. An additional 400 miles of snowmobile trails abut the Island Park snowmobile trail system. Abundant off-trail opportunities exist to challenge all riding experience. Island Park is one of Idaho's least restricted snowmobiling areas.

Most people think of an island as something belonging in an ocean. But deep within the boundaries of the Targhee National Forest lies an almost magical island that offers all of this and more. The same natural forces that made Yellowstone so scenic have made Island Park similarly beautiful - country just made for relaxation and recreation! To fully capture the spirit of the Island Park region, stay in on of the numerous ranches and guest lodges. You can fish in the summer and nordic ski or snowmobile in the winter. And it's just a short jaunt to Yellowstone National Park!