Oklahoma is home to one mole species: the eastern mole (Scalopus aquaticus). It lives across most of the state wherever soil conditions allow extensive burrowing, with a strong preference for moist, sandy, and alluvial soils. If you’re seeing raised ridges snaking across your lawn or small volcano-shaped dirt mounds, an eastern mole is almost certainly the culprit.
The Eastern Mole: Size, Habitat, and Behavior
Eastern moles are compact, muscular insectivores built for life underground. A typical adult measures around five to six inches in total length, with a short, nearly hairless tail roughly an inch long. Their oversized, paddle-like front feet are their defining feature, designed for powerful digging through soil. Their eyes are tiny and covered by skin, and they have no visible ears.
In Oklahoma, these moles favor lawns, gardens, pastures, and open woodlands, particularly areas with loose or loamy soil that’s easy to tunnel through. They’re especially common in yards with an overstory of oaks or pines and well-watered turf. They’re most active at night and during the early morning and evening hours, so you’ll rarely see one above ground. Instead, you’ll notice the aftermath: raised surface tunnels and small soil mounds.
Moles are solitary animals. A single mole can create an impressive amount of tunnel damage, so what looks like an infestation is often just one or two individuals working a territory.
What Moles Eat
Moles are not rodents and they don’t eat plant roots or bulbs. They’re insectivores, and their diet consists almost entirely of soil-dwelling invertebrates: earthworms, grubs, ants, termites, slugs, snails, centipedes, beetles, and crickets. Earthworms and grubs make up the bulk of their meals. This constant hunt for food is what drives all that tunneling through your yard.
Surface Tunnels vs. Deep Tunnels
Moles build two distinct tunnel systems, and understanding the difference matters if you’re trying to control them. Shallow hunting tunnels sit just below the surface, about four to six inches wide, and create the raised, winding ridges you see across your lawn. These are feeding corridors the mole may use once or revisit regularly.
Deep tunnels run ten inches or more below ground. Moles use these for resting, rearing young, and hunting during cold winter months. The small mounds of dirt you find on the surface are created when moles push excavated soil up from these deeper tunnels. These mounds are typically round and symmetrical, with the hole in the center plugged with soil.
Mole Damage vs. Gopher Damage
Oklahoma also has pocket gophers, and their damage can look similar at first glance. The key difference is in the mounds. Mole mounds are roughly circular with a plugged center hole. Pocket gopher mounds are fan-shaped or crescent-shaped, with the plugged hole off to one side. Gophers also don’t leave the raised surface ridges that moles do.
If you’re finding small holes in your lawn about one to one-and-a-half inches in diameter with no loose soil around them, those aren’t from moles either. Those are more likely from insects, crawfish, or small rodents. Mole activity always involves displaced soil, whether as raised ridges or pushed-up mounds.
Trapping: The Most Effective Control Method
Trapping is the most reliable way to remove moles from your yard. Three trap types work well: harpoon traps, scissor-jawed traps, and choker traps. All are widely available at hardware stores and farm supply retailers in Oklahoma.
The most important step is placing your trap in an active tunnel. Moles use some tunnels repeatedly and abandon others after a single pass. To find the active ones, use a broomstick to poke small test holes in several different surface runs. Check back the next day. Tunnels where the holes have been repaired are active, and that’s where you want to set your trap.
For shallow tunnels with less than an inch of soil on top, scissor and harpoon traps can be placed from above without digging. Center the trap over the run so that the jaws straddle it (for scissor traps) or the prongs sit directly above it (for harpoon traps). Use a flat tool like a masonry trowel to clear a path so the trap jaws or prongs can pass through the soil cleanly. Then press down the loose soil at the top of the run to create a small obstruction where the trigger will rest. When the mole pushes through that obstruction, it trips the trap.
Choker traps require a bit more excavation. They’re also directional, meaning you need two traps at each location: one facing each direction the tunnel leads away from the opening you’ve dug. Stake choker traps in place so a captured mole can’t drag the trap away. For any trap type, if you haven’t caught anything within three days, move the trap to a different active run.
Oklahoma Trapping Regulations
Oklahoma law permits trapping moles on your property, but there are rules about trap types. Legal traps include box traps, smooth-jawed leg-hold traps with a jaw spread of no more than eight inches, and enclosed trigger traps. Standard mole traps (harpoon, scissor, choker) fall within these categories. Every trap must be checked at least once every 24 hours. Traps set on property you don’t own or lease must bear your name. Fines for violations range from $25 to $200.
If you’re using smooth-jawed double-spring offset traps on land you don’t own, you’re required to post signs at all entrances from public roads. Trapping on your own property doesn’t require signage.
Do Repellents and Grub Treatments Work?
Castor oil-based repellents are the most studied option, and the results are modest. In controlled testing, castor oil products reduced mole activity in treated areas for about 30 days. The catch is that the product needs to be thoroughly watered into the soil to have any effect. That means irrigating with a half-inch of water before applying the repellent, then following up with at least another inch of water afterward. For a large lawn, this takes real effort and the protection is temporary.
A common suggestion is to eliminate grubs in your lawn, reasoning that without food, moles will leave. The reality is more complicated. Grubs are only one part of a mole’s diet. Earthworms, which you don’t want to eliminate, are equally important. And even when grub treatments are applied, moles often increase their burrowing activity for several weeks as they search harder for remaining food before eventually moving on. Soil insecticides are expensive, offer no immediate relief, and can harm beneficial invertebrates and songbirds in the process.
Physical barriers are effective but only practical for small, high-value areas like garden beds or seedling nurseries. A barrier requires burying 36-inch-wide aluminum sheeting or quarter-inch mesh hardware cloth to a depth of 24 to 30 inches, with six inches left extending above ground. That’s a significant installation project for anything larger than a small plot.
Realistic Expectations
Oklahoma’s warm, moist soils and abundant insect life make it excellent mole habitat, so complete, permanent elimination from a property is difficult. New moles can move into vacated tunnel systems from neighboring land. Trapping is the fastest solution for removing the moles currently active in your yard, and repeating the process as needed each season is the most practical long-term approach. Most homeowners find that one or two well-placed traps in active runs resolve the immediate problem within a week.