Photo: Isle Royale National Park The Duncan Narrow Campground which was was temporarily closed earlier this season due to human-wildlife interactions, has been closed once again. It will remain closed at least through the end of the month.

HOUGHTON — Isle Royale National Park has closed Duncan Narrows Campground for the second time this month following increased wolf activity at campsites due to improperly stored food. The closure runs until July 31, with the possibility of an extension if necessary.

Over the weekend, a wolf or wolves accessed the interior of a shelter by tearing, scratching and pushing though the screen. They pulled clothing and other items out of the shelter and chewed at a cooler stored improperly in the shelter. No campers were in the shelter or harmed when this activity occurred. An investigation is ongoing.

Efforts earlier this month to deter wolf activity at the Duncan Narrows Campground through a shorter closure and increased hazing were ineffective. According to a press release from Liz Valencia, the park’s acting administrative officer, to address the interest wolves have with human food and trash and the continued non-compliance with food storage regulations in this campground, the park decided to close the campground for the remainder of the month.

Park staff will monitor the closure and conduct hazing to discourage wolves from entering the campground. Increased staff presence and hazing will be similar to the efforts currently being done at Three Mile Campground including paintball guns, air horns, and installation of motion-sensing noise-producing devices.

Duncan Narrows Campground is accessible only by water to visitors with boats, kayaks, and/or canoes. Specific food storage guidance for boaters and paddlers and all visitors can be found at https://www.nps.gov/isro/planyourvisit/food-storage.htm

The goal is to reopen Duncan Narrows and Three Mile campgrounds on August 1, but the closures could continue and additional regulations or closures could occur throughout the park if necessary.