Ice dunes are naturally occurring formations of snow and ice that can appear along shorelines, particularly in areas where cold temperatures meet large bodies of water. These mounds of ice, often seen on lakeshores or coastal areas during the winter months, are formed when the wind pushes water, ice, and snow onto land, creating layered deposits. They can range in size from small piles of snow to towering structures that stretch several feet high.

The process begins when waves or wind-driven water splashes onto the shore, and then freezes in cold temperatures. As the waves crash and recede, they push additional layers of ice and snow on top of each other. Over time, these layers build up to form the characteristic dunes. Ice dunes are most commonly seen along the Great Lakes, particularly in areas where winds and waves are strongest during winter storms.

While ice dunes can be fascinating to observe, they can be dangerous, especially when they are located near large bodies of water. The ice that forms these dunes can be unstable, and walking on or near them can lead to dangerous situations, such as falling through the ice or being caught in a sudden wave. In addition, ice dunes are susceptible to erosion, meaning that they can collapse unexpectedly, causing the surrounding area to be flooded by water.

For those who encounter ice dunes, it’s important to exercise caution. Never attempt to walk on or near them, especially when the temperature fluctuates, as the ice may be thinner than it appears. As with any ice-related hazard, always check local safety reports about ice conditions before venturing into areas known for ice dunes.