How do I check closures at Isle Royale?

This page lists the park's current NPS alerts, refreshed hourly. The National Park Service's own current-conditions page for Isle Royale is the authority for road status and closures.

Which months are hardest to visit Isle Royale?

January, February, March, April, November, December average very few recorded visits (under 2% of the busiest month), which usually means seasonal closures or limited access. That's an inference from NPS visitor counts, so confirm on nps.gov.

Alerts & closures

Is Isle Royale open right now?

Last verified October 1, 2026Alerts refresh hourly

The NPS says: “Isle Royale National Park is open annually from April 16 to October 31. Transportation services are offered from May to September. The island and its surrounding islands are closed to all visitors from November 1 to April 15 due to extreme winter weather conditions and for the safety and protection of visitors. This closure extends 4.5 miles out into Lake Superior from the island. Park headquarters during the winter is in Houghton, Michigan. Summer headquarters is located at Mott Island on Isle Royale.”

From the NPS

Current alerts

1 closure2 caution3 information

Park Closure
Tent Camping Closed at Multiple East End Campgrounds
Due to increased human-wildlife interactions and food storage concerns, individual tent sites and group sites at Three Mile, Daisy Farm, Moskey Basin, and Caribou Island Campgrounds are currently closed. Tent and hammock camping are not permitted anywhere within the campground. Off-trail camping zones 10, 11, 12, 13, 30, 31, 32, 33, 34, 35, 36, 37, 38 are closed. Shelters remain open. Closed areas will be patrolled to ensure compliance.
More on nps.gov
Caution
Island Mine Campground Stream Low
The stream has very little water flow. Campers should bring enough water to Island Mine or plan on collecting water along your route.
Caution
Harmful Algal Blooms Occurring in Lake Richie and Intermediate Lake
Blooms are tested for toxin levels and monitored. Toxin levels are consistently low on Isle Royale. It is not recommended to filter water in any areas where there is surface scum, strong odors, or other evidence of a significant bloom. Blooms move around depending on wind and rain – filter water from places where blooms are not present or a different water source. It is low risk to filter water from relatively clear areas of an impacted water source.
More on nps.gov
Information
Boat Fuel Unavailable
Fuel for boaters will not be available from September 13 through October 31 except for emergencies only. Boaters are encouraged to bring extra fuel in containers.
More on nps.gov
Information
All Backpacks Must be in Storage Area at Three Mile and Rock Harbor.
All backpacks must be stored in backpack storage areas at Three Mile and Rock Harbor campgrounds. All food and scented items are to be in the Food Storage Lockers. Containers should be kept in the Food Storage Locker when space allows or near the Food Storage Locker, do not store in tents.
More on nps.gov
Information
Food Storage Regulations in Effect
Proper food storage is required on Isle Royale. All food, trash, scented items, cooking supplies, cooking utensils, and fish/fish parts must be stored properly. To learn more about food storage and to learn how to properly store your food, trash, and scented items, click "more."
More on nps.gov

Checked Oct 1, 2026, 3:39 PM ET from the NPS alerts feed. Closures can be partial (one road or trail), so read each alert.

Opening hours (NPS)

Isle Royale National Park Open Season (April 16 through October 31)
monday All Day
tuesday All Day
wednesday All Day
thursday All Day
friday All Day
saturday All Day
sunday All Day

monday	All Day
tuesday	All Day
wednesday	All Day
thursday	All Day
friday	All Day
saturday	All Day
sunday	All Day

Before you go

Entrance: $7 / person
Very quiet (often seasonal closures): January, February, March, April, November, December.

Isle Royale guide: crowds, fees & more →Reservations in 2026 →

FAQ

Isle Royale: open or closed?

Is Isle Royale National Park open year-round?: The National Park Service says: "Isle Royale National Park is open annually from April 16 to October 31. Transportation services are offered from May to September. The island and its surrounding islands are closed to all visitors from November 1 to April 15 due to extreme winter weather conditions and for the safety and protection of visitors. This closure extends 4.5 miles out into Lake Superior from the island. Park headquarters during the winter is in Houghton, Michigan. Summer headquarters is located at Mott Island on Isle Royale." Roads, campgrounds and visitor centers can still close for the season or for weather, so check current alerts.
How do I check closures at Isle Royale?: This page lists the park's current NPS alerts, refreshed hourly. The National Park Service's own current-conditions page for Isle Royale is the authority for road status and closures.
Which months are hardest to visit Isle Royale?: January, February, March, April, November, December average very few recorded visits (under 2% of the busiest month), which usually means seasonal closures or limited access. That's an inference from NPS visitor counts, so confirm on nps.gov.

Sources · 3

1.Isle Royale National Park — current conditions · National Park Service
2.NPS Data API — alerts · National Park Service
3.NPS Visitor Use Statistics — monthly recreation visits, 2021–2025 (IRMA stats REST service) · National Park Service (U.S. Department of the Interior) — Visitor Use Statistics Program

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