Water-access at Niagara Springs, Crystal Springs Lake, and Box Canyon has been closed in response to the discovery of quagga mussels upstream at Centennial Water Park in Twin Falls. Visit agri.idaho.gov for updates and more information.
Official Government Website


ATTENTION: Dogs are not permitted beyond the parking lots. Harriman State Park of Idaho is a waterfowl and wildlife refuge. Dogs cannot be left unattended and must always be on a six-foot leash. Department employees may impound or remove any stray or unattended animals at the owner’s expense. (IDAPA 26.01. 20.175. 09)

There is a $7 Motor Vehicle Entrance Fee (MVEF) per vehicle to visit the Park. Your receipt tab from Harriman is also good for the day at Mesa Falls and Henrys Lake State Park. You can purchase a 2023 Annual MVEF Pass for $80 at Park Headquarters. Vehicles registered in the State of Idaho can purchase a $10 Idaho State Park Passport from the Department of Motor Vehicles.

Please Be Bear Aware! The season from May-September sees heightened bear activity in the park, requiring visitors to use extra caution when recreating. Please read park signage where posted, stop by the visitor center to speak with a Ranger, and be aware of your surroundings when visiting. Remember to make noise; travel in groups; only hike/bike during daylight hours.

Guided tours of the Historic Railroad Ranch buildings are available 10:00 a.m. – 3:00 p.m. on Friday, Saturday, and Sunday from Memorial Day Weekend to Labor Day.

Follow us on Facebook for current trail conditions, events, and link to local weather.

**Note: If you do not have a Facebook account, please use your phone or browser, and scroll to the very bottom of this page. There you can see the latest Harriman State Park posts, including conditions updates.

Park Reservations
By phone: 1-888-9-CAMPID or 1-888-922-6743

The Railroad Ranch was the full-time or part-time home of Roland and Gladys Harriman, ranch managers, cattle foremen and cowboys. Now it can be your part-time home, too. Follow the links below for more details on the various lodging opportunities in Harriman State Park. Pets are not allowed on park trails or in any of the buildings or yurts, due to the ranch being on the list of National Historic Places as well as a wildlife refuge.



Bring your family or group to Harriman State Park for a picnic or barbeque on the banks of the beautiful Henrys Fork of the Snake River.


  • Season: May 15 – Oct. 15
  • Type of Use: Day Use
  • Max Number of People: 50
  • Check In: 9:00 a.m.
  • Check Out: 10:00 p.m.
  • Cost: $100


  • ADA Accessible
  • 2 BBQ Grills (36” x 36”)
  • Picnic Tables


To Make Reservations contact the park office at 208-558-7368.


Railroad Ranch Dormitory & Dining Hall

  • Groups of 15 to 36 can reserve the rustic log dormitory and original neighboring Dining Hall

Bunkhouse & Cookhouse

  • Bunkhouse, with cookhouse, accommodates up to 13 people in two buildings

Laura Clarke Scovel Education Center

  • The Scovel Education Center is a group facility with 10 cabins for 20 visitors and a conference center with kitchen and surrounding a court yard

Boys House

  • The Boys House is a completely renovated meeting room for 75 people with river front views 

Ranch Manager’s House

  • This 4-bedroom fully furnished log home, for 8, has a modern kitchen, a rustic knotty-pine living room with a stone fireplace and an enclosed sun porch. It’s perfect for that once-in-a-lifetime fly-fishing vacation

Cattle Foreman’s House

  • This is a beautifully furnished three-bedroom cabin (maximum capacity of 6) located within the historic Railroad Ranch. A wood burning stove, complete kitchen, single bed, open-out sofa,  and two queen size beds make this historic cabin an incredibly comfortable way to enjoy Harriman State Park. 

Harriman Yurts

  • Two Mongolian-style domed tents are available near Silver Lake

Harriman Backcountry Yurt

  • Becker Backcountry Yurt 

This unique outdoor experience allows you to get away from it all by hiking or biking to a backcountry yurt to enjoy the splendor of Harriman State Park. The yurt sits on a knoll overlooking Thurmon Creek and grassy meadows with views of the Tetons.


  • Season: May 1st – November 30th
  • Distance from Parking: 1.5 miles
  • Sleeps: 6
  • Cost: $85-$90
  • Check-in Time: 3:00 pm
  • Check-out Time: 12:00 pm


  • Wood Stove
  • Camp Stove
  • 2 Bunk Beds (twin over queen)
  • Table and Benches
  • Hutch
  • Vault Toilet
  • Firewood
  • Bear Proof Food Storage Box


This is a backcountry, “pack it in, pack it out” experience. You are responsible to bring everything you need, other than what is listed above. All trash must be packed out.

  • Water (No potable water is available at the yurt. Water must be packed in or can be pumped and filtered, from Thurmon Creek at campers’ own risk).
  • Propane Fuel Canisters for Stove and Lantern (1 lb. green Coleman type)
  • Pots, Pans and Cooking Gear
  • Garbage Bags
  • Bedding
  • Bear Spray


  • No Campfires
  • No Smoking
  • No Pets
  • No Horses


You are in Bear Country! Be Bear Aware.

  • Proper Food storage is required.
  • Carry bear spray.
  • Hike in groups.
  • Make your presence known.
  • Check with park for Bear information, warnings and updates.

There are no landline telephones readily available, and cell coverage can be spotty. The park office is over 3 miles away and is open 8 am- 6 pm, (208) 558-7368. Rangers do live onsite, and are housed in the Ranch Foreman’s House and historic Ranch Office. In a medical emergency call 911.


Current Conditions

Contact the Park

Address: 3489 Green Canyon Rd
Island Park, ID 83429
Phone: (208) 558-7368
Hours of Operation: Day-use locations within state parks are open from 7 am to 10 pm, per Idaho state code 26.01.20 (5). Day-use hours may change based on park manager discretion.

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