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Dogs, cats and other mammals are not allowed on the island. This includes pets on boats within the park boundaries, which extend 4 ½ miles into Lake Superior from the outermost land areas of the park.
Mosquitoes and black flies typically hatch around late May to early June. Typically, they are the worst in late June and early July. So there you go.
Cell phone service may not be available on Isle Royale National Park - do not depend on it for your trip.. Make sure you have printed maps and a plan. If you are on a high ridge you may be able to find a signal but be aware that this may be a Canadian tower, and additional fees through your cell phone carrier may apply.
When the Rock Harbor Trading Post in Rock Harbor and Windigo Store in Windigo are open, there is a satellite phone available for visitor use (additional fees do apply).
Is there Wi-Fi available for use? Wi-Fi service is not available in the park. It's a great time to bond with your family!
Download the free Chimani app to your smart phone to easily navigate your way around the park with maps.
Isle Royale is Eastern Time zone. Plan accordingly when booking/planning your transportation.
There are no storage lockers on the Island. The concession operation at Rock Harbor and Windigo does offer a service to store gear for a fee but you can't store stove fuel or food. Contact the Rock Harbor Lodge office for more information.
Rock Harbor and Windigo both have potable water, from approximately mid-May until mid-September. At all of the designated campgrounds, there is a source of water, but it needs to be filtered or boiled. To purify your water, it needs to be passed through a 0.4 micron or less water filter. It can also be boiled, but should be at a rolling boil for at least 3 minutes, which requires fuel and time. A UV type filter will NOT work.
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Showers are available on the island's northeast end at Rock Harbor and at the southwest end at Windigo.
The National Parks Service provided this comprehensive packing list. See below for water filter clarification. You can also download and print it here.
ISLE ROYALE USER FEE: The National Park Service levies a user fee for Isle Royale: 2018 fee: $7.00 per day (not per night) per person 16 years and older. You can also purchase an an annual Isle Royale Pass (approximately $60) covering the pass-holder and 3 other people for any length of time. Pay the fee ahead here. Need to allow 2 weeks for the pass to arrive or you can purchase at Rock Harbor or Windigo Visitor Center.