Harriman State Park Wildlife Walk
3489 Green Canyon Rd
Island Park, ID
A private railroad-family retreat for most of a century, now an 11,000-acre refuge where trumpeter swans winter and the Henry's Fork glides past the old ranch buildings.
Harriman State Park is an 11,000-acre wildlife refuge wrapped around eight miles of the Henry's Fork of the Snake River, near Island Park in eastern Idaho. For most of the twentieth century it was a private working cattle ranch and family retreat, and much of its magic comes from how gently people have trodden here. The meadows, spring creeks, and lodgepole forests were protected long before they became a park.
It is best known for two things that could not be more different: trumpeter swans and trout. A large share of the trumpeter swans that winter in the contiguous United States spend the cold months on the park's spring-fed waters, and the Henry's Fork that runs through the old ranch is spoken of in reverent tones by fly anglers as some of the most challenging dry-fly water anywhere.
What Guests Love
- Trumpeter swans and sandhill cranes on quiet meadows and spring creeks
- Walking or skiing miles of gentle trails past the preserved Railroad Ranch buildings
- Some of the most famous, and most humbling, dry-fly water in the world on the Henry's Fork
- Moose and elk moving through the willows in the early morning and evening
Worth Knowing
- This is a refuge first, so trails and access are managed to protect wildlife; stay on paths and keep your distance from swans and moose
- The fly fishing here is catch-and-release and famously technical, not a beginner's water
- Winters are long and cold; the park becomes a Nordic ski and snowshoe destination when the roads close to cars
- Summer brings mosquitoes to the wet meadows, so pack repellent
Details
Island Park, ID
Learn about Harriman State Park Wildlife Walk
The Railroad Ranch
The land was assembled in the early 1900s by investors tied to the Union Pacific Railroad, and it became known simply as the Railroad Ranch. Among the owners were the Harriman and Guggenheim families, who ran cattle here and used the ranch as a private retreat reachable by rail.
In 1977 Roland and Averell Harriman gave the ranch to the state of Idaho outright, with the condition that it be protected as a park and wildlife refuge. It opened to the public in 1982. The old ranch buildings still stand along the river, and walking among them is a quiet lesson in a vanished way of Western life.
Home of the trumpeter swans
The trumpeter swan is the largest native waterfowl in North America, and it was hunted nearly to extinction. Harriman's spring creeks stay open through the deep freeze of an Idaho winter, and that open water makes the park one of the most important wintering grounds for the swans in the Lower 48.
They share the refuge with sandhill cranes, elk, moose, and a long list of raptors and songbirds. The park's wildlife walks are laid out so that you can see this abundance without disturbing it, which is why the swans keep coming back.
The Henry's Fork
The stretch of the Henry's Fork that slides through the old Railroad Ranch is one of the storied trout streams of the world. Its wild rainbow trout are large, wary, and educated, rising to hatches so specific that anglers travel across oceans to test themselves against them.
Even if you never pick up a rod, the river is the heart of the place, a wide, glassy spring creek moving slowly through the meadows. It is fed by the enormous springs of the Island Park country, which give it steady flows and steady temperatures that trout and swans both depend on.
Seasons at the ranch
Summer and early fall are the classic seasons for walking, wildlife watching, and fishing, when the meadows are green and the hatches are on. Fall brings elk into rut and the first swans down from the north.
Winter transforms Harriman. The roads close to cars and the park becomes a groomed Nordic-ski and snowshoe retreat, silent except for the swans. It is a different park entirely, and for many people the most beautiful one.
Closest Boutels
The closest Boutel™ stays, so you can turn this stop into an overnight. Each is an independently owned, editorially selected place to stay.
Things to Do Near Island Park
Island Park Caldera
Surrounding area
The park sits inside one of the largest volcanic calderas on Earth, a broad forested basin on the Yellowstone hotspot track.
Mesa Falls
About 15 miles east
Two big waterfalls on the Henry's Fork, the upper one dropping more than a hundred feet, reached by a historic scenic byway.
Yellowstone National Park
About 25 miles east
The West Entrance at West Yellowstone is a short drive, putting geysers and wildlife within easy reach.