Keep COVID-19 on the run: wash hands frequently, practice social distancing when possible, and respect the needs of others. Details.
Official Government Website

September 10, 2021:

Attention Visitors: Eastern Idaho Public Health and the Department of Environmental Quality (DEQ) have issued a health advisory for Henrys Lake and upper portions of Island Park due to the presence of
Harmful algal blooms (HAB) in the water. The blooms can be extremely toxic to humans and animals and we ask that all visitors adhere to the following recommendations:
– Do not ingest the water
– Do not allow children or pets to swim in the water
– Fishing is okay, but DEQ recommends removing the fat, skin, and organs before cooking. Wash hands often and cook only the filet portions of the fish prior to consumption.
Thank you for your understanding!
For more information, read the full news release:
March 2021:

Due to problems with the drain field, the Dump Station at Henrys Lake State Park will be closed for, at least, the 2021 season.   A study will be completed in 2021 to see if the station will be replaced or it is not feasible with today’s protocols.

Alternate Dump Stations are:

  • Bing Lemke Forest Service Dump Station, Last Chance, 20 miles south of the Henrys
  • Ashton Visitor Center, 43 miles south
  • Grizzly RV is available in West Yellowstone, 15 miles east.

The only sewage dump at the park will be the FULL hook-up sites.

We are sorry for the inconvenience.


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

Location: 15 miles W of Yellowstone National Park | 138 miles N of Pocatello, ID | 300 miles N of Salt Lake City, Utah| 369 miles E of Boise, ID


  • Amphitheater
  • Boat Ramp/Launch
  • Dump station
  • Fire Rings
  • Firewood Sales
  • Fish Cleaning Station
  • Indoor Restrooms
  • Indoor Showers
  • Life Jacket Loaner Station
  • Picnic Areas
  • Swimming - Lake/River
  • Vault Toilets
  • Water - Drinking


  • Cabins
  • RV Campsites
  • Tent Campsites

Trail Types: Hard path (ADA); hike, bike

ADA Accessibility features:

  • ADA Boat Ramp
  • ADA Cabin
  • ADA Campsite
  • ADA Restroom
  • ADA Trail

Acreage: 585

Elevation: 6,470

Coordinates: 44.6164, -111.3677

Overnight: 83 serviced sites, 3 cabins (one ADA), 3 designated ADA campsite

Nearby: ATV and Nordic trails, Yellowstone National Park, Harriman State Park, golf, Mesa Falls Scenic Route, Fort Henry Historic Byway, horseback riding on Nez Perce Trail

Wifi Info: WiFi hotspot is available near the Adam's Loop Bath House and near the Caddis Loop Bath House

Learn: Junior Ranger program, campfire programs, guided hikes

Visitor Center: No

Museum Available: No

Current Conditions

Contact the Park

Address: 3917 E. 5100 N.
Island Park, ID 83429
Phone: (208) 558-7532 Summer | (208) 558-7368 Winter
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.

Email the Park

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