Hiker in Isle Royale National Park died after losing consciousness

A Michigan woman died Monday of unknown medical complications while backpacking through a remote national park on Lake Superior, officials said.

The woman, a 37-year-old from Battle Creek, Michigan, was hiking with her partner near Lake LeSage in Isle Royale National Park when “she suddenly experienced health complications,” the National Park Service said in a news release Wednesday. Her condition worsened and she eventually became unable to walk, park officials said.

The woman then lost consciousness and stopped breathing, officials said. CPR was performed, but “attempts to revive her were unsuccessful.”

Other backpackers in the area contacted Michigan State Police via a delayed 911 text message and that information was relayed to a National Park Service dispatch center, officials said. Emergency medical technicians found the group and remained with them Monday evening.