There’s a site I used to hunt years ago. I won’t tell you where it is. That’s actually the whole point of this post.
When I first found it, maybe three or four of us knew it existed. I went there with one dog at a time, rotating through the truffle dogs I had over those years, learning the ground together. We’d work the area, make our finds, fill our holes, and leave the forest exactly as we’d found it. The undergrowth was thick. The soil was soft. The place had that particular quality that good truffle ground has — a kind of undisturbed aliveness. My dogs and I knew this place, and this place knew us.
I stopped going when it became widely known.
In the years since, I’ve heard from students, colleagues, and even people meeting me for the first time who already know about this site before we’ve said much more than hello. Recently, a former student described walking through the area and finding the undergrowth almost entirely gone. Trampled. Bare. Holes scattered across the ground, left open, unfilled.
I wasn’t surprised. But I was sad.
I’ve been thinking about how to talk about this for a long time, because I think there’s something important here that our community keeps missing, even the people who already feel bad about what’s happened to places like this.
The conversation I keep hearing goes like this: “It’s sad, but at least people aren’t sharing their other sites.”
That framing is about access. About protecting what we each have. And I understand it, I really do. But it stops short of the thing I most want us to reckon with: the damage being done to that site isn’t primarily about who gets to hunt there. It’s about what’s happening to the forest itself.
What’s Actually Happening Underground
Most people, when they think about truffle site damage, think about raking — the practice of mechanically disrupting the soil to harvest truffles before they’re ready, indiscriminately and destructively. And they’re right that raking is harmful. It destroys immature truffles, disrupts the reproductive cycle, and damages the soil structure in ways that take years to recover from.
But here’s what I want to say clearly: heavy, repeated foot traffic from dog teams does the same category of damage through a different mechanism.
The underground ecosystem of a healthy truffle site is built around mycorrhizal networks, living fungal webs that connect the root systems of trees, move water and nutrients between them, and create the conditions in which truffles form. Foundational research by Suzanne Simard and colleagues at the University of British Columbia established that these networks are not passive infrastructure. They are active, dynamic systems through which trees exchange carbon and resources, and through which entire forest communities are interconnected.
These networks are also extraordinarily fragile. Soil compaction from repeated foot traffic crushes the air pockets that fungal threads and tree roots depend on. It disrupts the water movement that keeps the system alive. It ruptures the threads themselves. While most compaction research focuses on heavy machinery, the underlying mechanism — reduced air and water movement through soil — applies wherever repeated pressure is applied to the same ground, including foot traffic over time. Mycorrhizal fungi are among the most sensitive organisms to compaction and among the slowest to recover. Research published in the ISME Journal found that mycorrhizal communities showed significant disruption under compaction stress, with recovery timelines extending years beyond the disturbance.
A 2025 study on truffle-hunting landscapes in northern Italy found that increased visitor traffic leads directly to soil compaction, disruption of mycorrhizal networks, and loss of the microhabitats essential for truffle formation. The researchers documented hunters’ grief and ecological loss as they watched sites they had used for generations deteriorate under pressure from overuse. What they described is exactly what I’ve been watching happen here.
A single guided group visit can represent the footprint of five, six, or more people moving across the same terrain. Multiply that across a full season of regular visits and the cumulative impact looks very different from what most people picture when they think about responsible truffle hunting.
When mycorrhizal networks break down, the trees that depend on them become more vulnerable to drought, disease, and stress. The undergrowth plants begin to disappear. The wildlife that depends on that undergrowth for food and shelter loses habitat. In Pacific Northwest forests specifically, the northern flying squirrel depends on native truffles and other hypogeous fungi as a primary food source, and plays a direct role in spreading fungal spores through the forest. Deer, elk, and black bear consume truffles opportunistically as well. When truffle ecosystems are degraded, the effects don’t stay underground. They move through the food web in ways that most people standing at the trailhead never consider.
The forest doesn’t care whether it was a rake or a boot. The damage has the same name.
The Harm From Digging, and Why It Matters How You Leave the Hole
Truffle hunting with a dog is fundamentally different from raking. A trained dog identifies only ripe, aromatic truffles, leading you to a precise location where digging is both necessary and minimal. A rake has no such precision. It strips the entire forest floor, pulling up ripe and unripe truffles alike, destroying the surface in broad sweeps. Dog-guided hunting is the ethical standard for good reason.
But digging is still digging. At each find, we’re opening the soil, exposing mycorrhizal threads to air and light, disturbing the fungal mat at the dig site. When done carefully, and when the hole is properly filled and tamped, the impact is localized and recoverable. The soil is restored, oxygen exposure is minimized, and the network has a chance to heal.
When the hole is left open, none of that happens. The exposed mycelium dries out. The surrounding soil structure weakens. At a site already receiving heavy traffic, open holes multiply across the ground until the cumulative damage starts looking a lot more like raking than the careful, targeted practice we pride ourselves on.
I hear regularly that at heavily visited sites, holes are routinely left unfilled. That’s not truffle hunting done well. It’s truffle hunting done carelessly, and the forest pays for it.
What We Keep Missing
We talk a lot in this community about the harm rakers cause. We should. But raking is an easy target because it’s visibly destructive and practiced by people outside our community. It lets us feel like we’re on the right side of the issue.
The harder conversation, the one I think we owe the forests we love, is about what we are contributing to when we visit the same widely-known site repeatedly, when we send students and clients there, when we share locations in community spaces, when we optimize for the find rather than for the long-term health of the ground.
I’m not exempt from this conversation. I helped popularize truffle hunting with dogs in the Pacific Northwest and across the country. That comes with a responsibility to say clearly: the way this practice is growing is not sustainable, and we need to do better.
Finding Your Own Ground
The most protective thing any of us can do for truffle ecosystems is to develop our own sites and visit them lightly.
Not because you’re hoarding access, but because distributing the work across more ground is one of the most protective things we can do for the ecosystems we love. The Society for the Protection of Underground Networks documents compaction and habitat disruption as among the primary threats to mycorrhizal fungi globally. The answer is distributed, low-impact use, not concentrated traffic at known sites.
The evidence is in my own practice. In 16 years of active hunting, I can count on one hand the number of times I have come across another truffle dog team in the same forest at the same moment. That is not luck. It is what distributed, self-found, responsibly visited site use actually looks like.
Finding your own sites is hard. It takes time, patience, and a lot of drives down unmarked roads. But that effort is part of the relationship. It’s the price of belonging to the forest, not just taking from it.
Leave It Better Than You Found It
The minimum standard for any truffle hunter should be this: fill your holes. Tamp the soil. Replace the leaf litter. These aren’t optional courtesies. They’re the difference between a dig site that recovers and one that doesn’t.
Beyond the dig itself, think about your overall footprint. Making a loop through an area rather than retracing your steps isn’t just good practice for your dog. It means the ground you’ve already walked isn’t walked again. Where terrain allows, spread your movement. Be deliberate about how many people are covering how much ground. A handler and a dog moving thoughtfully through a forest is one thing. A handler, a dog, and several observers making multiple passes over the same terrain is another.
There is always a balance between what’s best for your dog and what’s best for the forest, and part of becoming a skilled hunter is learning to hold both at once. The dog needs fresh ground to work. The forest needs time to recover. The answer isn’t to choose one over the other. It’s to have enough locations that neither is ever asked to give more than it can.
The site I used to love is still out there. I hope it recovers. I hope the people who visit it begin to understand what their presence and their open holes actually cost. And I hope that as this practice continues to grow and more people come to it, we build a culture of stewardship that takes the forest seriously as something more than a backdrop for an activity that has the potential to harm the very thing it depends on.
That’s the kind of hunting I want to teach. That’s the kind of hunter the forest needs.
Further reading and sources
Simard, S.W., et al. (1997). “Net transfer of carbon between ectomycorrhizal tree species in the field.” Nature, 388: 579–582.
Hartmann, M., et al. (2014). “Resistance and resilience of the mycorrhizal community to logging-associated compaction.” ISME Journal.
Cambi, M., et al. (2021). “Impacts of Logging-Associated Compaction on Forest Soils: A Meta-Analysis.” Frontiers in Forests and Global Change.
Pérez-Anaya, O., et al. (2025). “Truffle Hunters’ Perception of Socio-Ecological Change in Langhe and Roero, NW Italy.” Sustainability, 17(17): 8053.
SPUN — Society for the Protection of Underground Networks. “Threats to Mycorrhizal Fungi.” spun.earth.
