Harriman State Park combines Henrys Fork scenery, wildlife habitat and the historic Railroad Ranch near Island Park.
Plan your visit
3489 Green Canyon Rd, Island Park, Idaho 83429
- Admission
- $7 vehicle entry, or accepted park passport/pass; lodging and winter access cost extra
- Hours
- Day use generally 7 a.m.–10 p.m.; manager may adjust
- Parking
- Park parking areas
- Restrooms
- Visitor Center and Boys House; ADA restroom listed
- Access
- ADA trail and restroom listed; confirm the route or lodging you need
- Setting
- Outdoor
Photos have not been added to this listing yet.
🌳 Amenities & Features
- 🥾 Hiking, biking and horseback trails
- 🐦 Wildlife viewing
- 🏛️ Railroad Ranch and seasonal interpretation
- 🎣 Henrys Fork fishing
- ❄️ Nordic skiing, snowshoeing and fat biking
- 🛖 Reservable lodging
- 🧺 Picnic areas
💡 Good to Know
- The park currently warns of construction from approximately Labor Day through Halloween. Follow closures and stay on marked trails.
- Pets are restricted to parking areas beside vehicles, attended and on a leash no longer than six feet. They are not allowed on park trails or roads.
- Winter trail access carries a separate fee, currently $6 per person per day. Confirm grooming, lodging and program availability before travel.
Listing review date: 2026-10-15
Visitor update, October 15, 2026: The latest park update says the temporary construction dam at Silver Lake may have been undermined, with contractors, divers and park staff addressing the situation. Follow current signs and staff instructions; repair completion and any affected routes need confirmation.