Before heading to the caves, please call the Ice Line at (715) 779-3397 - extension 3, for the most current ice condition information.
The website features real-time images of conditions at the Mainland Sea Caves.
Some things to think about before you head out on the ice:
Visiting the caves in winter requires at least a 2 mile hike (round trip) on the ice of Lake Superior. Travel on Lake Superior can be dangerous any time of the year. Traveling across the ice demands extra attention to personal safety. Because of the unpredictability of lake ice, traveling across it is never completely safe. Before heading out, visitors must understand all of the risks involved, and the physical demands required for hiking out to the caves.
Apostle Islands National Lakeshore staff checks the ice and monitors the weather to determine when the Mainland Caves are accessible. NPS is not, however, able to check every day. Cold temperatures can form thick ice, but wind and waves can break up that ice and make it very unstable. The conditions at the caves can change in less time than it takes to walk there. The Ice Line will be updated when a thick, stable, expansive sheet of ice forms near the Mainland Caves and allows access. Until then, ice travel is too dangerous to reliably say that the caves are accessible. The Ice Line will have the most current information that NPS knows of. It can be reached at (715) 779-3397 extension 3.