Raised Footprints in Snow: When the Surface Around a Step Disappears

A footprint normally goes down into snow. These appear to do the opposite, standing above the surface like tiny pedestals. The surprise comes from looking at the result after the surrounding snow has changed.

The print stays while looser snow moves

A step compresses snow beneath it. If wind later removes the looser material around that compacted patch more readily, the footprint can remain as a raised shape. The walker has not lifted the snow; the neighbouring surface has been lowered.

The effect varies with snow condition and weather. A photograph does not tell us exactly how long each shape took to emerge, and the pattern alone is not a full assessment of the slope’s snow stability.

Follow the trail as a drawing

The repeated shapes make a natural line through the image. Compare them with Sonja Hinrichsen’s deliberate snow drawings, where footsteps are used as an artistic tool. For an icy surface with a very different kind of surprise, listen to Cory Williams’ frozen-lake recording.

The gallery reaches beyond Antarctica

The photographs range from Blencathra and Snowdonia to Alaska and the area near McMurdo. This is not an exclusively Antarctic phenomenon: the British examples offer particularly clear counterpoints to the polar scenes. Look at the edges of the prints as well as their centres. Some retain a recognisable outline, while others are less complete, showing how an ordinary trail can become an irregular series of raised patches. The captions identify the individual locations and photographers, allowing each example to be considered in its own setting.

A step compresses a patch; later removal of surrounding material changes the relative height. Looking at a line of prints can make that process easier to understand than studying one isolated shape. The repeated steps show where a person or animal passed before the surface changed.

A clue is not a complete snow assessment

The feature can indicate that wind has worked on the snow, but it does not by itself establish slope stability or a precise duration of exposure. The photographs illustrate wind-shaped surface changes; they cannot serve as a stand-alone test of avalanche conditions.