Trapping is the most reliable way to get rid of gophers and moles, and in many situations it is the only method that consistently works. Both animals are subterranean, solitary, and territorial, which means you are usually dealing with a small number of individuals doing a disproportionate amount of damage. That makes targeted removal more practical than it sounds, but it also means that broad-spectrum approaches like repellents and sonic devices tend to disappoint. The two animals differ enough in biology and diet that the specific tactics for each one diverge in important ways.
Gophers Versus Moles and Why It Matters
Before you do anything, figure out which animal you actually have. Gophers are rodents that eat plant roots, bulbs, and tubers. Moles are insectivores that eat grubs, earthworms, and soil-dwelling insects. The distinction matters because it changes which traps you buy, where you place bait, and whether habitat modification can help. Gophers leave fan-shaped mounds of finely pulverized soil with the entrance hole plugged and off to one side. Moles push up rounded, volcano-shaped mounds and also create long, visible surface ridges where they have been hunting just below the grass. If your garden plants are being pulled underground from below, that is almost certainly a gopher. If your lawn looks like something is tunneling an inch beneath the surface and the plants themselves are fine, you probably have moles.
The two animals rarely coexist in the same tunnel system. Gophers dig deeper, more structured burrow networks and actively maintain them. Moles dig shallower feeding tunnels that they may use only once. Mapping studies using ground-penetrating radar have traced gopher tunnel systems averaging about 0.6 meters deep, with hundreds of meters of interconnected passages in a single territory.
Trapping Gophers
Trapping is considered the gold standard for gopher control by university extension services across the western United States. The two most widely used trap designs are pinch-type traps (like the Macabee) and choker-style traps (like the Gophinator). Research comparing these two designs found that the Gophinator was more effective overall, largely because it was better at capturing larger gophers that sometimes managed to trip and escape smaller pinch traps.1Crop Protection. The influence of trap type and cover status on capture rates of pocket gophers in California
The basic technique is the same regardless of trap style. Find a fresh mound, probe the soil with a long screwdriver or commercial gopher probe about a foot away from the mound on the side nearest the plugged hole. When the probe suddenly drops a couple of inches, you have found the main tunnel. Dig down to expose the tunnel, set two traps facing opposite directions so the gopher is caught regardless of which way it approaches, and cover the hole with a board, cardboard, or clod of soil to block light. Gophers investigate and attempt to seal any breach in their tunnel, which is what brings them into the trap. Check traps at least once a day.
A few practical details make a real difference. Fresh mounds are essential because they tell you the gopher is actively working in that area. Old, dried-out mounds may lead you to abandoned tunnel sections. Some trappers swear by wearing gloves to avoid leaving human scent, but controlled comparisons have not consistently shown this matters for gophers. What does matter is placing the trap inside the main lateral tunnel rather than in the short spur that leads up to the mound. The lateral tunnel is the gopher’s highway; the spur to the surface is a dead end it may not revisit.
Trapping Moles
Mole trapping follows a different logic because mole tunnels serve a different purpose. The shallow, raised ridges you see in your lawn are feeding tunnels that a mole may or may not use again. The deeper runs that connect one area of the yard to another are the ones worth targeting because the mole travels through them repeatedly. To identify an active deep run, step down a short section of a surface tunnel and mark it. If the tunnel is pushed back up within a day or two, it is active and worth trapping.
The three common mole trap designs are harpoon traps (which plunge spikes downward when triggered), scissor-jaw traps (which close from the sides), and choker-loop traps. All three work when placed correctly. The key is positioning the trap directly over or inside the active run and making sure the trigger plate sits at the right height to be activated by the mole passing through. Unlike gopher trapping, you generally do not dig into the tunnel to set a mole trap. Most mole traps are designed to be set from the surface directly above a shallow run.
Baits and Poisons
Toxic baits are available for both gophers and moles, but their effectiveness varies. Gopher bait typically uses strychnine or anticoagulants like chlorophacinone or diphacinone applied to grain. Because gophers are herbivores, grain-based bait makes biological sense and gophers will readily consume it. You apply the bait directly into the tunnel using a probe or bait applicator, placing it in the main run rather than the mound spur. Follow label directions carefully, as these are restricted-use products in some states.
Mole bait is trickier because moles eat insects, not grain. The most widely sold mole baits are shaped and scented to mimic earthworms or grubs. They contain bromethalin, a neurotoxin. Results are mixed. Some homeowners report good success, but moles can be picky eaters, and a mole that encounters an unfamiliar object in its tunnel may simply push it aside rather than eating it. Trapping remains more consistently effective for moles than baiting.
One important safety note applies to all rodent poisons: secondary poisoning is a real risk to pets, raptors, and other predators that might eat a poisoned gopher or mole. Anticoagulant baits are especially problematic in this regard. If you have dogs that dig, or if owls and hawks hunt in your area, trapping is a safer choice for the broader ecosystem.
Fumigation and Gas Methods
Several fumigation approaches have been tried against burrowing rodents. Aluminum phosphide tablets, which release phosphine gas when they react with moisture in the soil, are highly effective but are restricted to certified applicators in most jurisdictions because the gas is acutely toxic to humans. Carbon monoxide from pressurized exhaust machines, often marketed under trade names like the PERC machine, represents a less regulated alternative. Research testing pressurized exhaust against pocket gophers found moderate effectiveness, with about 68% of gophers controlled.2Wildlife Society Bulletin. Is pressurized exhaust an effective tool against burrowing rodents? That is a meaningful reduction, but not the near-total elimination that well-placed trapping can achieve.
Gas cartridges, sometimes called smoke bombs, are sold at garden centers and are the easiest fumigant for homeowners to use. You light the cartridge and push it into the burrow, then seal the entrance. In practice, gopher and mole tunnel systems are often extensive enough that the gas dissipates before reaching lethal concentrations at the far ends. Sandy or porous soils make this worse, since gas escapes through the soil itself. These products work best in short, compact burrow systems and poorly in large, branching networks.
Repellents, Sonic Devices, and Home Remedies
This is where expectations and reality diverge sharply. Castor oil-based repellents are the most commonly sold gopher and mole deterrents. The idea is that castor oil coats soil and makes it unpleasant for the animals. Some homeowners see temporary displacement, but there is little controlled evidence of lasting results. The animal may simply tunnel around the treated area or return once the product breaks down.
Ultrasonic and vibrating stakes claim to drive moles and gophers away with sound or vibration. These products are widely sold and widely ineffective. Moles and gophers live in an environment full of vibrations from foot traffic, vehicles, rain, and their own digging. A small battery-powered stake does not create a stimulus meaningfully different from what they already tolerate. University extension programs in California, Oregon, and other western states consistently advise against relying on these devices.
Home remedies circulate endlessly online. Flooding tunnels with a garden hose rarely works because the tunnel system is too extensive and water drains away through the soil. Dropping chewing gum, human hair, or mothballs into tunnels has no scientific support. Planting “gopher spurge” (Euphorbia lathyris) as a living repellent is another popular suggestion, but controlled tests have not confirmed it deters gophers. If you are dealing with real damage, skip the folklore and start with traps.
Habitat Modification for Moles
Because moles eat grubs and other soil invertebrates, reducing their food supply is sometimes suggested as a long-term control strategy. The logic is straightforward: if you eliminate the grubs in your lawn, moles will leave to find food elsewhere. Grub-control products, particularly neonicotinoids like imidacloprid, are effective at killing white grubs. However, research has found that imidacloprid also significantly reduced non-target soil organisms, suppressing populations of springtails, thrips, and adult beetles by roughly 54 to 62% compared to untreated soil.3Pedobiologia. Comparative impacts of white grub (Coleoptera: Scarabaeidae) control products on the abundance of non-target soil-active arthropods in turfgrass Those non-target organisms include beneficial decomposers and predators that contribute to soil health.
Even setting aside the ecological cost, habitat modification has a practical limitation: moles eat earthworms as much as they eat grubs, and you do not want to eliminate earthworms from your lawn. A mole’s diet shifts with availability, and earthworms are often the primary food source in established lawns with healthy soil. Killing grubs may reduce mole activity somewhat, but it is unlikely to eliminate it entirely unless the lawn’s entire invertebrate community collapses, which would cause its own problems.
Physical Exclusion
When you are protecting specific high-value areas rather than trying to clear an entire property, physical barriers are the most permanent solution. For garden beds, lining the bottom and sides of raised beds with galvanized hardware cloth (half-inch mesh or smaller) prevents gophers from tunneling in from below. For individual trees or shrubs, you can make wire baskets from the same material and plant directly inside them. The basket should extend at least a foot deeper than the root ball and rise a few inches above the soil surface.
For lawns, some homeowners install hardware cloth horizontally beneath new sod. This is expensive and labor-intensive but creates a gopher-proof layer. It is most practical for small, high-priority areas like putting greens or ornamental gardens. Moles are harder to exclude because their shallow feeding tunnels are above the depth where most buried barriers sit. A barrier that blocks gophers at 12 to 18 inches may do nothing to a mole working at 3 inches.
Gopher baskets and underground fencing are especially worthwhile in reforestation and orchard settings, where a single gopher can kill young trees by gnawing the roots. Integrated management strategies for protecting conifer plantings, for instance, combine risk assessment, population monitoring, and physical or chemical controls into a coordinated plan rather than relying on any single method.4Europe PMC. Integrated management tactics for predicting and alleviating pocket gopher (Thomomys spp.) damage to conifer reforestation plantings
Assessing and Mapping Tunnel Damage
One underappreciated challenge is simply knowing what is going on underground. A single pocket gopher can maintain hundreds of meters of tunnels, and the surface mounds represent only the excavated material pushed up from deeper construction. Ground-penetrating radar has been demonstrated as a practical tool for mapping these systems without digging. In one study, researchers mapped 267 meters of gopher tunnels across five survey areas, were able to distinguish active tunnels from deteriorating or abandoned ones, and even detected an underground pipeline in the process.5Wildlife Society Bulletin. Demonstration of ground‐penetrating radar as a useful tool for assessing pocket gopher burrows Similar radar surveys have successfully mapped mole tunnel networks, producing detailed, non-invasive images of the subsurface layout.6Applied Soil Ecology. Reconstructing mole tunnels using frequency-domain ground penetrating radar
For the average homeowner, radar surveys are overkill. But this research underscores an important point: what you see on the surface dramatically underestimates the extent of the tunneling below. A yard with five mounds might have a tunnel system stretching across the entire property. That is why controlling the animal, rather than just filling in the tunnels, is the only approach that stops the damage. Filling or flooding tunnels without removing the resident gopher or mole just gives the animal a renovation project.
When to Call a Professional
Most homeowners can handle one or two gophers or moles with traps and some patience. The learning curve is real but not steep: the hardest part is accurately locating the main tunnel on your first attempt, and you get better at it quickly. Where professional help becomes worthwhile is in situations involving large properties, high gopher or mole densities, or protected species. Some states protect certain mole species or restrict particular control methods, so check your local regulations before you start.
Professional wildlife control operators have access to restricted-use fumigants, commercial-grade trapping equipment, and experience reading tunnel systems. They can also help when you have tried trapping without success. The most common reason traps fail is placement in the wrong tunnel segment, and an experienced trapper can often diagnose the problem quickly.
The Ecological Side of the Equation
It is worth knowing that both gophers and moles play real roles in their ecosystems, even if those roles conflict with your lawn. Gophers are ecosystem engineers. Their constant digging mixes soil layers, buries surface organic material, and creates patches of bare, disturbed ground that many native plants depend on for germination. Research on pocket gopher ecology has found that their excavations generate a shifting mosaic of soil conditions and nutrient levels that actually promotes plant diversity and supports disturbance-dependent species.7Trends in Ecology & Evolution. Pocket gophers: ecosystems with a hole Moles similarly aerate soil, improve drainage, and consume pest insects like grubs and cutworms.
None of this means you have to tolerate a gopher eating your vegetable garden or a mole destroying your lawn. But it does suggest that total eradication across a large property may not be desirable or even achievable, since new animals will eventually move into vacant territory from surrounding areas. A more realistic goal for most people is to protect specific areas with exclusion, trap actively when damage appears, and accept that some level of coexistence is part of having a yard that sits on top of living soil.