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

About the Park

One of Idaho’s great high mountain lakes, Henrys Lake is the kind of place that anglers dream about. Anglers fish for cutthroat, brook and cut-bow hybrid trout in what is considered one of the finest trout fisheries in the West. The park also offers beautiful nature trails for hiking and biking and wildlife and wildflower viewing.

Located 15 miles from Yellowstone National Park and surrounded on three sides by the Continental Divide, Henrys Lake State Park campsites are situated on the shoreline of the 6,000-acre lake. After a long day of fishing and hiking, take a swing on the porch of one of three park cabins.

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.

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