TREE WELLS: THE HAZARD THAT DOES NOT NEED AN AVALANCHE
13 min · Free lesson · written from fifteen years in the terrain
After this lesson you understand why riders die in trees on a perfectly stable day, what to do in the first seconds if you go into a well, and how a party actually searches timber, which is not the same job as searching a debris field.
The Technique
- A tree well is the void that forms around a trunk where the branches shed snow and stop it consolidating. From above it looks like snow. It is a hole, often deep, filled with loose unconsolidated snow and branches. **No avalanche is required. The snowpack can be rock solid and the danger is unchanged.**
- Understand the mechanism, because it explains why strong riders die in them. You go in head first, usually while looking somewhere else. The snow above collapses in on top of you. You are inverted, in loose snow that will not support you, with your arms pinned and your face in the powder. Struggling packs the snow tighter. Most people who go in cannot get themselves out, and the people who die do so within minutes of a fall nobody saw.
- That last clause is the whole lesson. **Almost every fatal case shares one fact: nobody was watching.** A rider goes into the trees, the group carries on, and the gap between "where did he get to" and a body is very short. This is why we ride timber the way we do rather than as a matter of style.
- So the protocol is unglamorous and non negotiable. In trees you ride in sight of a partner, and if you cannot see them you stop and wait. Not the group of six spread over a kilometre, a named partner who is your responsibility and whose responsibility is you. You stop where you can see them and they can see you. **On a sled in tight timber this matters more, not less**, because a machine puts distance between you fast and the noise means nobody hears anything.
- If you go in, and this is worth rehearsing in your head now: do not thrash. Fight to make an air space in front of your face first, with a hand or an arm, before you do anything about getting out. Then work toward the trunk, because the trunk is the only solid thing near you and it gives you something to push against. Do not try to go straight up the way you came. Keep your phone or a whistle somewhere you can reach with a pinned arm, and use it.
- Now the search, and it is a different job to a debris field. **A transceiver still helps, and a buried rider in a well is exactly why it lives on your body**, but the terrain works against you: signal reflection off wet timber, short ranges, snow depth that varies wildly, and a search area defined by where somebody might have wandered rather than by a visible deposit.
- So the timber search is visual and systematic before it is electronic. Go back to the last place they were seen and work forward along the line they were travelling. **Check tree wells directly, one at a time, by going to the tree and looking in**, because from ten metres away a well containing a person looks identical to one that does not. Look for a ski, a pole, a glove, a hole in the surface, disturbed snow, or a machine parked with nobody near it.
- Two things about sleds specifically, and they are the practical heart of this lesson. **If you are the one lost or stuck in the trees, leave your machine running.** Sound travels through timber far better than sight does, and a party can follow an idling engine straight to you. The only caveat is exhaust: if you are down in a hole or a tree well with the machine near you, fumes are a real risk, so consider position before you consider noise.
- **And if you are the one searching, shut your machine off and listen.** You cannot hear a whistle, a shout or another engine over your own motor. A party hunting through timber with every sled running is a party that has removed its best sense. Stop, kill the engines, and listen properly for thirty seconds. Then move and do it again.
Common Mistakes
Treating tree riding as low risk because the avalanche danger is low. Fix: they are unrelated hazards. A stable snowpack does nothing about a tree well.
- Riding trees as a loose group instead of in pairs. Fix: a named partner, in sight, who stops when you stop. Six people spread out is nobody watching anybody.
- Thrashing when you go in. Fix: air space first with a hand in front of the face, then work toward the trunk. Struggling packs snow around you.
- Searching timber with every sled running. Fix: engines off, listen, move, repeat. Sound is the sense that finds people in trees.
The Drill
The partner discipline day. Next time you ride timber, ride the whole day in a nominated pair with one rule: if you cannot see your partner, you stop. Count how many times you stop. Most riders are surprised and slightly embarrassed by the number, which is the point of the drill.
Snow immersion incidents are survivable only with a partner close enough to act within minutes, which is why the protocol matters more than any technique. This is general guidance and not a substitute for hands on training, and the avalanche modules in this library apply in timber as well as on open slopes.
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