Small holes in the ground near your home or yard may be entry and exit points for subterranean termites, the most common and destructive type in North America. These holes are typically pencil-width or smaller, often surrounded by tiny pellets of soil, and connect to an underground network of tunnels that can extend dozens of feet in every direction. Identifying them correctly matters because subterranean termites cause billions of dollars in structural damage each year, and the holes you see on the surface represent only a fraction of what’s happening below.
What Termite Holes in the Ground Look Like
Subterranean termite holes are small, roughly the diameter of a pencil or slightly smaller. They’re often found in bare soil near foundations, along fence lines, around tree stumps, or close to woodpiles. The soil immediately around the hole may appear slightly raised or granular, sometimes forming a small mound of excavated dirt. Unlike ant hills, which tend to have a conical shape with fine sand, termite exit holes are more flush with the ground and less conspicuous.
Some of these holes serve as “exit holes” for reproductive termites (called swarmers) during mating season. When conditions are right, typically in spring or after rain, worker termites prepare smooth, debris-free openings for swarmers to emerge, take flight, and establish new colonies. You might notice dozens of small holes appearing overnight, sometimes accompanied by discarded wings on the ground nearby. Outside of swarming season, the holes may be sealed over by workers and harder to spot.
The Tunnel System Below the Surface
What you see at the surface is the tip of a much larger network. Subterranean termites build extensive underground galleries connecting their colony to food sources, sometimes traveling 100 feet or more through the soil. These tunnels are made from a mixture of soil, chewed wood, and termite saliva, creating a humid, protected highway system that keeps the colony shielded from open air and predators.
Where these underground tunnels reach a structure or above-ground wood, termites construct mud tubes, pencil-width tubes of soil and saliva that climb foundation walls, piers, or other surfaces. Exploratory tubes may rise from the soil without connecting to any wood, as termites search for new food sources. Drop tubes hang downward from wood to the ground, looking like small stalactites, and serve to reconnect foraging routes to the soil. Finding mud tubes on your foundation is one of the clearest signs that ground holes nearby are termite-related.
Termite Holes vs. Other Ground Holes
Several insects and animals create holes in the ground that can be confused with termite activity. Knowing the differences saves you from unnecessary alarm or, worse, from ignoring a real problem.
- Ant holes are often surrounded by a noticeable mound of fine, loose soil. Ants are visible moving in and out during the day, while termites avoid light and rarely appear at the surface.
- Cicada exit holes are roughly finger-width (about half an inch), larger than termite holes, and appear seasonally in large numbers. You’ll usually find the empty cicada shells nearby.
- Bee or wasp burrows tend to be round, clean-edged holes in sandy or compacted soil, often with a single occupant visibly entering and leaving.
- Earthworm holes are tiny and surrounded by small castings (coiled soil deposits) that look distinctly different from termite-excavated dirt.
The key distinguishing features of termite holes: they appear in clusters near wood or structures, they lack the obvious mounding of ant nests, and you almost never see the insects themselves at the surface during daylight. If you dig carefully near a suspected termite hole, you may find the pale, soft-bodied workers just below the surface, or the beginning of a mud tunnel.
How Close to Your Home Is a Problem
Termite holes in the middle of your yard, far from any structure, are less immediately concerning than holes within a few feet of your foundation. Subterranean termites forage outward from their colony in all directions, so ground activity near your home’s perimeter suggests the colony’s foraging range already includes your house. Look for mud tubes on your foundation walls, basement walls, or crawl space piers as confirmation.
Soil conditions matter too. Termites need moisture, so holes appearing in consistently damp areas (near leaky faucets, downspout drainage, or poor-grading zones where water pools) are more likely to signal an established colony. Dry, well-drained soil is less hospitable, though not immune.
Treatment Options for Ground Activity
Two main approaches exist for dealing with subterranean termites found in the soil: liquid soil barriers and baiting systems. Many pest control professionals use one or both depending on the situation.
Liquid Soil Barriers
The traditional method involves applying a liquid termiticide into the soil around and under a structure’s foundation. This creates a chemical barrier that termites cannot cross without being killed. Modern products are non-repellent, meaning termites can’t detect and avoid them. Instead, they pass through treated soil, pick up the chemical, and carry it back to their colony. This approach requires trenching along the foundation and sometimes drilling through concrete slabs, so it’s almost always done by a licensed professional.
Bait Stations
Baiting takes a different strategy. Small plastic stations are inserted into augured holes in the ground, typically 1 to 2 feet from the foundation and spaced every 10 to 15 feet around the home’s perimeter. Additional stations go near known trouble spots like woodpiles, stumps, or moist areas. The stations contain cellulose material combined with a slow-acting compound that disrupts termites’ ability to molt. Termites feed on the bait and share it with nest mates, gradually collapsing the colony over weeks.
Bait stations sit flush with the soil surface and are checked on a regular schedule, anywhere from monthly to annually depending on the system. On some properties, baits are the sole treatment. On others, they’re paired with a partial liquid barrier for extra protection. Either approach requires professional installation and monitoring, since over-the-counter products rarely deliver the same reliability.
Steps You Can Take Around Your Yard
While professional treatment handles active infestations, reducing conditions that attract termites to your yard helps in the long run. Remove dead stumps, fallen branches, and stored firewood that sits directly on the ground. Keep mulch at least 6 inches from your foundation, since mulch retains moisture and provides a food source. Fix leaky outdoor faucets and redirect downspouts so water drains away from your home rather than pooling near the foundation.
If you spot holes in the ground and suspect termites, probe the area gently with a screwdriver or stick. Termite tunnels just below the surface will feel hollow, and you may expose the pale, white workers inside. Mud tubes on nearby surfaces confirm the identification. Getting a professional inspection at that point gives you a clear picture of the colony’s size and location before choosing a treatment plan.