Attractions and places to see around Island Park offer a diverse landscape shaped by the Henry's Fork Caldera, featuring flat plains, forested hills, and mountains. This scenic destination in Idaho is known for its proximity to Yellowstone National Park and its unique 33-mile stretch along U.S. 20, often called the "Longest Main Street in America." The area provides a variety of natural features and points of interest for visitors.
Last updated: April 26, 2026
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See also https://youtu.be/j9FSPUdDfDQ?si=7v3oDZj_FVpttgvZ
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From Targhee Pass it is just 9 miles east to the town of West Yellowstone. For an easy day in/out of town, there are ample camping options littering the trail for about one mile headed north from the pass!
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The 360 degree views experienced while traversing the ~3 miles surrounding the hill called Lionhead are absolutely unreal. Anywhere your gaze falls, be it up to Lionhead or down to Hebgen Lake, you are sure to be left humbled and in awe!!
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Wow! What a climb! Headed southbound, the ascent to Targhee Divide had better grades than I did in high school! Targhee Divide offers beautiful views to the north and south. Summiting Targhee Peak is also possible by taking the ridgewalk to the southeast followed by a short scramble to the top!
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At Big Springs is a great place to turn around or take a dip in the river to cool off. This trail goes along the Great Divide route and is flat singletrack most of the way. This trail would be great for an easy ride, or a good place to get in some speed work training.
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Scenic and teaming with wildlife Harriman State Park's Silver lake is a great place to ride on your way to/from Yellowstone. Or, you could stay for a while and avoid the crowds of the more famous neighbor while still have an incredible outdoor experience.
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Island Park is rich in natural beauty. You can visit the magnificent Big Springs, a first-magnitude spring and National Natural Landmark that feeds the Henry's Fork of the Snake River. Don't miss the impressive Upper and Lower Mesa Falls, which are among the last undisturbed waterfalls in the West. Other notable features include Henry's Lake, Island Park Reservoir, and the scenic Silver Lake within Harriman State Park.
Yes, Island Park offers several family-friendly attractions. Big Springs is a great spot where you can see large rainbow trout in clear waters. Harriman State Park, home to Silver Lake, provides extensive trails suitable for various ages and opportunities for wildlife viewing. The Mesa Falls Scenic Byway and its visitor center are also accessible for families.
For a glimpse into the region's past, visit the Johnny Sack Cabin near Big Springs. This historic cabin, built in 1929 by a German cabinet maker, is known for its intricate woodworking and unique bark details. Within Harriman State Park, you can also explore the historic buildings of the Railroad Ranch, offering insight into early 20th-century ranching life.
Island Park offers several stunning viewpoints. Targhee Pass – Montana State Line provides excellent views, and from there, it's just 9 miles to West Yellowstone. For truly panoramic 360-degree views, drive up to Sawtelle Peak during the summer months to see the Island Park Caldera, Island Park Reservoir, and Henry's Lake.
Island Park is an outdoor enthusiast's paradise. You can find numerous trails for hiking, cycling, and mountain biking. For hiking, explore routes like the Big Springs Interpretive Trail or the Silver Lake and Thurmon Creek Loop. Cyclists can enjoy the Golden Lake loop or the Silver Lake loop from Thurman Creek. Mountain bikers have options like the Silver Lake and Ridge Trail Loop. You can find more details and routes in the Hiking around Island Park, Cycling around Island Park, and MTB Trails around Island Park guides.
Yes, for those seeking a challenge, consider the Targhee Divide – Elevation 10,000 ft, which offers a strenuous climb and rewarding views. The Lionhead Ridge Walk also provides unreal 360-degree views over approximately 3 miles, making it a challenging and scenic experience.
Island Park is excellent for wildlife viewing. Harriman State Park is an 11,000-acre wildlife refuge where you can spot elk, moose, and trumpeter swans. The Henry's Fork of the Snake River, particularly when floating from Big Springs to Mack's Inn, also offers chances to see wildlife, including moose. Large rainbow trout are frequently visible in the clear waters of Big Springs.
The summer months are ideal for most outdoor activities in Island Park, including hiking, mountain biking, and water sports on the reservoirs and lakes. During this time, scenic drives like the one to Sawtelle Peak are accessible. Spring brings fresh greenery and opportunities to see wildlife, while fall offers beautiful foliage. Winter is popular for snowmobiling and cross-country skiing.
Yes, Island Park serves as a popular base for visitors to Yellowstone National Park. The west entrance of Yellowstone National Park is conveniently located just 15 miles from Island Park, making it an excellent starting point for exploring the famous national park.
Beyond the main highlights, consider exploring Quake Lake (Earthquake Lake), formed by a massive landslide in 1959, which offers a unique and poignant landscape. The Coffee Pot Rapids on the Henry's Fork of the Snake River, accessible via a 2.5-mile trail, also provide a scenic and less crowded experience.
Island Park is famously known for having the 'Longest Main Street in America,' which stretches for 33 miles along U.S. 20. This unique layout was established in 1947, primarily to allow for liquor sales outside of traditional city limits, making it a notable point of interest and a distinctive feature of the area.

