Pocket gophers are one of the most common burrowing pests across Utah, turning up in everything from backyard lawns to alfalfa fields and even solar farms. These solitary, underground rodents belong to the genus Thomomys and spend nearly their entire lives below the surface, digging extensive tunnel systems that can cause serious damage to plants, infrastructure, and irrigation systems. If you’re seeing fan-shaped dirt mounds in your yard or field, you’re almost certainly dealing with a pocket gopher.
How to Identify Pocket Gopher Activity
Pocket gophers rarely come above ground, so you’ll identify them by their mounds rather than by spotting the animal itself. Gopher mounds are crescent or horseshoe-shaped, with a soil plug off to one side. Their tunnels run 6 to 12 inches below the surface. This is the key detail that separates them from the other burrowing animals you might encounter in Utah.
Moles leave circular, volcano-shaped mounds with the plug in the center, and their soil tends to be clumpier. Moles also sometimes push up visible ridges just beneath the surface as they hunt for insects. Voles, on the other hand, create aboveground runways connecting small burrow openings, usually hidden under grass. Voles also girdle trees above the soil line, while pocket gophers do their damage below ground, chewing through roots where you can’t see it until the plant is already dying.
If you’re seeing horseshoe-shaped mounds with the plug offset to one side, patches of dead grass, or trees and shrubs declining for no obvious reason, pocket gophers are the most likely culprit in Utah.
Damage They Cause in Utah
The damage pocket gophers inflict goes well beyond cosmetic lawn problems. In agricultural settings, they eat plant roots directly, with alfalfa being a prime target. They consume the tap roots, killing the plant, and then their soil mounds bury neighboring plants, smothering them and reducing the vigor of entire fields. For Utah alfalfa growers, this can mean premature loss of field stands and expensive replanting. The mounds themselves also damage harvesting and mowing equipment.
In irrigated fields, which are common across Utah’s agricultural regions, gopher tunnels divert water away from where it’s needed, causing significant water loss. Tunnels through canal banks, ditch banks, and pond dams can weaken these structures to the point of seepage or outright failure. For a state where water management is already a serious concern, this kind of damage adds up fast.
Infrastructure damage is another major issue. Pocket gophers chew through electrical cables, internet lines, and irrigation pipes. Several solar farms in southern Utah have had their entire systems shut down because gophers gnawed through buried electrical lines. In residential areas, they damage lawns, kill garden plants and trees by eating roots underground, and leave yards full of unsightly mounds and dead patches.
When and How to Trap Pocket Gophers
Trapping is the most reliable control method for pocket gophers, and it works year-round since gophers stay active in every season. That said, your best results will come in spring and fall, when gophers are pushing up fresh mounds most actively. Trapping during frozen ground conditions is possible but significantly harder.
Two main trap styles are used: spring traps (brands like Macabee and Victor) and box-style traps. Both work, but placement matters more than the trap you choose. The key is finding the main tunnel, not just a side branch. To locate it, probe the soil about 8 to 12 inches from the plug side of a fresh mound. When your probe suddenly drops into open space, you’ve hit a tunnel. Main tunnels tend to be deeper and connect multiple mounds in a line, while lateral tunnels are shorter offshoots. Placing traps in the main runway produces significantly better results than trapping in side tunnels.
Set two traps facing opposite directions in the main tunnel so you catch the gopher regardless of which way it approaches. Cover the opened tunnel with a board or soil clod to block light, since gophers will investigate and try to plug any opening they detect.
Protecting Plants With Underground Barriers
If you’re planting new trees, shrubs, or garden beds, physical exclusion is one of the most effective long-term strategies. For individual plantings, bury hardware cloth or wire mesh with openings no larger than 3/4 inch. The barrier should extend at least 2 feet deep, with an additional 6 inches of mesh bent outward at a 90-degree angle at the bottom to prevent gophers from digging underneath.
Use galvanized or stainless steel wire for any barrier you want to last. For young trees and shrubs that only need temporary protection, light-gauge non-galvanized steel wire works well. It will rust and break down after several years, which actually prevents the wire from strangling growing roots over time.
For raised garden beds, lay hardware cloth or 3/4-inch poultry wire across the bottom of the bed before adding soil and planting. This is one of the simplest and most effective ways to keep gophers out of vegetable gardens and flower beds entirely.
Other Control Options
Toxic baits formulated for pocket gophers are available at farm supply stores and garden centers. These are placed directly into active tunnels using a probe or bait applicator, not scattered on the surface. Always follow the product label closely, particularly around pets, children, and irrigation water. In agricultural settings, bait application can cover more ground than trapping alone, but it’s less precise and carries more risk to non-target animals.
Some Utah residents try flooding tunnels, using vibrating stakes, or planting repellent species like gopher spurge. These methods are generally ineffective. Pocket gophers can seal off flooded tunnel sections quickly, vibrating devices have shown no reliable deterrent effect, and no plant has been proven to repel them from an area. Your best returns come from a combination of trapping for active infestations and wire mesh barriers for long-term protection of valuable plants.