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The comforting lie in a tracked slope

Kevin Hjertaas opens “The Tracked Experience” with a contradiction that most backcountry skiers already feel in their bones. Everyone learns the standard warning that tracks do not equal safety. A slope can be skied repeatedly and still avalanche. At the same time, almost everyone also senses that the hundredth skier on a line is not facing exactly the same snowpack as the first. Hjertaas takes that tension seriously instead of smoothing it over. His article is useful because it neither indulges the lazy confidence that comes from seeing old tracks nor falls back on slogans that ignore how snow actually changes under repeated traffic.

The piece works first as a conceptual reset. Hjertaas explains that ski resorts routinely use compaction and bootpacking to strengthen early-season snow and reduce the chance of deeper, full-depth failures. That much is familiar to avalanche professionals, but it becomes murkier once the setting shifts to the backcountry. There, traffic is less consistent, more weakly distributed and much harder to document. A skintrack leading into a popular zone can create the appearance of knowledge without the actual control that makes resort compaction meaningful. Hjertaas’s core point is that skiers need to distinguish between a slope that has truly been compacted in a stabilizing way and one that has merely been disturbed enough to look reassuring.

That distinction matters because the false lesson of a tracked slope is psychologically powerful. Skiers read the surface first. The eye sees evidence of human passage and starts building a story: if all those people made it down, maybe the danger was overstated. Hjertaas argues that this story is often badly incomplete. The article is really about uncertainty management. Tracks are seductive because they compress a complicated question about snow structure into a simple visual cue. His goal is to pry those two things apart again.

What skier compaction can actually do

The article gets stronger once it leaves intuition and turns to evidence. Hjertaas anchors the discussion in a revealing field example from Rogers Pass, where avalanche forecaster Zoe Ryan watched a skier trigger a small surface slide in heavily trafficked terrain during a deep persistent slab cycle. The expected step-down into the deeper weak layer never happened. Ryan’s best explanation was that early and repeated skier traffic had disrupted that problem where it formed. Hjertaas uses the moment well. He does not present it as a license to trust tracked slopes. He presents it as proof that skier traffic can matter in specific ways and under specific conditions.

From there he adds research that sharpens the limits. Studies on bootpacking and human compaction show that heavily compacted terrain can stabilize faster than untouched snow, sometimes by a substantial margin. But the article is careful about the type of compaction involved. Bootpacking drives force more deeply into the snowpack than skis do. Skiers float. They disturb upper layers more readily than deeper ones. That means the effect of repeated traffic is real but uneven, and much less reliable than the kind of systematic compaction resorts can produce. Hjertaas turns what could have been a neat conclusion into a more demanding one: skier traffic is not meaningless, but it is not a simple safety tool either.

Tim Haggerty’s contribution to the article makes that point even clearer. He distinguishes between true compaction and what he calls disturbance. If a weak layer was already buried before an area saw heavy use, later skiers may rough up the upper snowpack without eliminating the deeper problem. That is a critical distinction because it blocks the most common shortcut in recreational decision-making. A tracked slope might be different from an untouched slope, but different does not automatically mean safe. Hjertaas keeps returning to that uncomfortable middle ground. Snow can be altered without becoming trustworthy.

The article also highlights how expert operations exploit this nuance more effectively than recreational users can. Heli-ski operations sometimes use skier disturbance strategically on manageable upper-snowpack problems, laying tracks wall-to-wall so they can break up a concerning layer before the next storm. But Hjertaas does not romanticize that tactic. It depends on a level of staffing, repetition and professional judgment that most ski tourers do not have. The practical message is not that everyday skiers should imitate industrial-scale snow management. It is that they should recognize how much expertise sits behind apparently casual confidence in certain heavily used runs.

Why the communication problem may be the hardest part

The most interesting move in the article comes near the end, when Hjertaas shifts from snow science to public communication. Forecast centers must describe hazard across broad regions where some slopes are heavily trafficked and others are effectively pristine. That is a brutal translation problem. Forecasters like Ryan can understand that local variability exists, but bulletin space is limited and public users crave clarity. If a forecast starts explaining every possible exception, it risks becoming unreadable. If it simplifies too much, skiers may misapply the warning. Hjertaas shows that compaction is not just a technical snowpack issue. It is also a problem of how public expertise gets packaged for mixed audiences with uneven experience.

That challenge is especially important for newer backcountry users, who often begin on the most popular and most altered slopes. Their early experiences may make considerable hazard feel less serious than it is because they are learning on terrain where prior traffic has already changed the snow. Later, when they move into less disturbed zones, they may carry over a dangerously casual interpretation of the bulletin. Hjertaas is especially sharp here because he identifies a subtle pathway by which experience itself can miseducate. The skier does not ignore the forecast. The skier thinks they have learned how to live inside it, when in fact they have mostly learned one narrow, highly trafficked version of it.

The article’s closing takeaway is admirably unsatisfying in the best way. There is no clever hack here. Until forecasters have better public ways to communicate compaction-driven variability, and until most recreational users have far more local knowledge than they usually do, the safest default is to treat skier-altered slopes much like uncompacted ones. That conclusion may feel conservative after a nuanced discussion of how traffic can change the snow, but it is the right kind of conservatism. Hjertaas does not deny the complexity. He simply refuses to turn complexity into permission. “The Tracked Experience” is valuable because it gives skiers a more accurate mental model without pretending that a better model removes the need for restraint.