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Explore Sand Island Ice Caves, Apostle Islands National Lakeshore, Wisconsin
By February, an ice bridge might connect Sand Island to the mainland. The lake surface is usually a frozen white expanse. Lakeshore cliffs form a crimson red border to this arctic landscape. Pillars of ice extend to the cliff tops where waterfalls have hardened in place. Frozen lakewater encrusts the base of the cliffs. Inside the caves awaits a fairyland of needlelike icicles. The formations change from chamber to chamber and from day to day. In the right conditions, visitors can explore these ice 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 in a matter of hours, and make it unstable. Low Risk ice conditions allow the area to be deemed accessible to visitors.
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