Student-created device could change tree well safety

Powder is one of the most sought-after experiences for many skiers, yet also one of the most unpredictable.

Much safety attention focuses on avalanches, but another far less visible hazard causes serious accidents each winter, both on and off-piste: tree wells, snow cavities forming around tree trunks.

A team of students from Oregon State University has developed a device specifically for this scenario. Its goal is simple: to buy enough time for a rescue to be possible.

Tree wells form when snow accumulates around conifers, leaving an air cavity next to the trunk. From the surface, they look like part of the snowpack, but if a skier or snowboarder falls in, they can become trapped head-down in seconds.

In this position, it is extremely difficult to free oneself without assistance. Snow continues to slide into the hole, increasing the risk of suffocation even without an avalanche.

Studies on deep snow immersion indicate that the vast majority of people cannot self-rescue, making rescue speed a critical factor.

How Tree Well Guardian works

The project, dubbed Tree Well Guardian, originated as a product design exercise within the university.

The system is installed on the skier's boot and remains inactive throughout the day. If it detects the user remains inverted, a characteristic position for tree well falls, it starts a ten-second countdown. If a normal position is not regained, it automatically sends a GPS alert with the accident’s location.

This brief margin aims to prevent false alarms caused by normal skiing movements.

The idea arose after several students discussed fatal tree well accidents at Mount Bachelor, Oregon. The project won second prize in Invent Oregon, a university prototyping competition, and its creators continue to develop it to assess commercial viability.

The emergence of this device reflects a growing trend in the outdoor sector: the incorporation of smart systems capable of autonomously calling for help.

In recent years, solutions using motion sensors and geolocation to automatically detect accidents have begun to develop. Some experimental applications already collaborate with ski resort patrols, while integrated mobile phone localization functions have also proven useful in real-world rescues.

None of this replaces traditional safety equipment for ski touring or freeriding in avalanche terrain, where an avalanche transceiver, shovel, and probe remain essential. However, within resorts, where many users do not carry such gear, these new technologies could become an additional layer of protection.

In the mountains, rescues often depend on minutes. Therefore, the true value of projects like Tree Well Guardian lies in enabling someone to know there’s a problem before it’s too late.

As sensors, geolocation, and connectivity integrate into outdoor gear, snow safety may no longer solely depend on human reaction but also on systems capable of acting automatically when most needed.