A new hole in the lawn triggers the same question from most homeowners: is that a snake hole? The honest answer is that it probably is not. Snakes do not dig their own holes. They move into abandoned burrows that other animals excavated, so the opening you found was most likely dug by a mole, a vole, a chipmunk, a rat, or a turtle. The fix depends on which animal is responsible, which is why the first step is identification, not action. Mole damage, for example, produces raised tunnels and volcano-shaped mounds, and understanding why moles leave holes in your yard and how to fix them settles most of these cases before a snake is ever involved.
That distinction matters for two reasons. First, most snakes found in residential yards are harmless, and many of them eat the rodents and insects that created the holes in the first place. Second, acting on the wrong assumption wastes effort: filling a chipmunk burrow does nothing about the snake that lives in a crack along the foundation. This article covers what a snake hole looks like, how to tell it from other burrows, and what to do once you have confirmed what you are dealing with.
What a Snake Hole Looks Like
Snake holes range from half an inch to about three inches in diameter, and they can be circular or oval, with clean edges or jagged ones. That range is so wide that size alone never confirms a snake. Because snakes occupy burrows dug by other animals, the hole keeps the dimensions of its original builder. A former chipmunk hole is a clean opening about the size of a silver dollar. A vole hole is dime-sized and often sits right at the base of a plant in the root zone. A turtle burrow is dome-shaped with excavated soil piled in front of the entrance and a gentle slope heading down. Bare soil makes every one of these openings obvious, which is why homeowners who switch to front yard landscaping without grass often notice burrows they never spotted under a lawn.
Measure the Opening Before You Guess
Carry a tape measure or compare the hole to a common object. A silver dollar measures about 1.5 inches across, a dime about 0.7 inches, and a golf ball about 1.68 inches. Record four facts: diameter, shape, whether the edges look freshly dug or weathered, and whether soil is mounded at the entrance. These four details eliminate most suspects in under a minute.
Signs That Confirm a Snake
Two signs place a snake at a hole: shed skins and droppings. A shed skin looks like a dry, translucent tube that peels off in one piece, complete with scale patterns and a clear eye cap. Snake droppings are thick, dark brown or black, and dry into a cylindrical form with a chalky white cap at one end. The white cap is uric acid, the same compound that whitens bird droppings. If either sign sits within a foot or two of the opening, a snake is using that burrow.
Reading a Dropping Correctly
A fresh dropping is moist and dark. Once it dries, the white cap becomes the clearest clue. If the material is granular, or if it contains seeds and fur, the occupant is a mammal rather than a snake.
When the Skin Is the Only Sign
Skins can blow in from elsewhere, so one old skin near a hole proves little. Look for fresh droppings, repeat sightings, or a skin that is still soft and flexible. Those point to current activity, not a leftover from last season.
Which Animal Dug the Hole
Identification starts with the opening and then moves to the surrounding evidence. Each burrower leaves a different signature, and the table below summarizes the most common yard diggers. When you have a candidate, check it against a practical overview of snake holes in the yard to confirm your read before you take any action.
Burrow Profiles at a Glance
| Animal | Opening size | Shape and setting | Extra clues |
|---|---|---|---|
| Mole | 1.5-2 in | Circular mound shaped like a volcano | Raised ridges and tunnel lines across the lawn |
| Vole | 0.7 in, dime-sized | Round opening at the base of plants | Chewed stems, gnaw marks on tree bark |
| Chipmunk | 1.5-2 in | Clean, round, no mound | Often near rocks, walls, or foundations |
| Norway rat | 2-3 in | Smooth, worn entrance | Grease marks and runways along fences |
| Ground squirrel | 2-4 in | Fan of loose soil at the entrance | Alarm calls, animals active during the day |
| Snake (occupant) | Matches host burrow | No fresh digging of its own | Shed skin or droppings nearby |
Holes That Are Not Holes
Some openings have nothing to do with animals. Air vents, drainage pipes, and settled soil along a foundation can mimic burrows. If the opening has straight edges, manufactured material, or a consistent round bore, check for a pipe or conduit before you assume wildlife.
Active or Abandoned?
An active burrow shows fresh soil, tracks, or recently clipped vegetation at the entrance. An abandoned one collects leaves and spider webs. Check the opening at dusk and dawn, when most burrowers move, and photograph any animal you see from a distance instead of trying to catch it.
Why Snakes Move Into Your Yard
Snakes take up residence for three reasons: food, shelter, and moisture. A yard with a healthy rodent or insect population is a reliable food source. A brush pile, a stack of firewood, tall grass, or a loose rock wall offers cover. A damp corner, a dripping spigot, or a clogged gutter keeps the site comfortable even through dry weeks. Remove one of those three attractants and most snakes move on.
Entry Points Around the House
Snakes are opportunistic about openings. They slip under doors, through torn screens, into foundation cracks, and along utility penetrations. Sealing these gaps follows the same repair discipline you would use when fixing membrane tears and holes on a shower pan: clean the edges, close the gap completely, and inspect the repair a second time. Every opening you close removes one reason for a snake to linger near the building.
What the Resident Snakes Actually Eat
A single garter snake consumes dozens of slugs, worms, and insects each week, and larger species hunt the voles and mice that dig the burrows in the first place. Eliminating every snake from the property can increase rodent pressure, which then creates more burrows. The practical goal is not to remove snakes entirely but to make the yard less attractive so they relocate on their own.
How Snakes Get Inside Buildings
A snake using a burrow in the yard is a yard problem. A snake finding a route into the house is a different problem, and the two connect because burrow networks that run under the lawn often terminate against the foundation. Inspect the perimeter at ground level before you assume the hole in the grass is the whole story.
Weep Holes and Foundation Gaps
Weep holes in masonry and retaining walls exist to drain water, but they also create pass-through openings for small animals. Snakes and rodents use them to move between the yard and the wall cavity. If you see activity near a wall, check the weep holes first, then inspect expansion joints and cracked mortar.
Vents, Pipes, and Sills
Dryer vents, sump pump outlets, and the sill plate between the foundation and the first course of siding all offer access. Screen vents with hardware cloth, cap open pipe chases, and seal gaps with caulk or expanding foam. Do the inspection on a sunny day, when snakes are more likely to be basking near an entrance and easier to spot.
Filling the Hole and Removing Habitat
Once you confirm a burrow is abandoned, filling it is simple. Do not fill an active burrow while the occupant is home, and never pour gasoline, smoke, or chemicals into an opening. Those methods are illegal in many jurisdictions, dangerous, and ineffective, because the tunnels usually connect to a network that refills the hole within days.
Steps for Filling an Abandoned Burrow
- Watch the entrance for two consecutive evenings to confirm no animal is using it.
- Stuff the opening loosely with crumpled newspaper or straw and wait 48 hours. An undisturbed plug means the burrow is empty.
- Fill the hole with soil, tamping every few inches so the tunnel collapses and cannot be reused.
- Compact the surface and overseed or lay sod so the scar blends into the lawn.
- Recheck after heavy rain, because settling tunnels often reopen the entrance.
Habitat Changes That Discourage Snakes
- Mow regularly and keep thatch thin so hiding places stay short.
- Keep woodpiles, lumber, and debris raised at least 18 inches off the ground and away from the house.
- Trim shrubs so the lowest branches clear the ground.
- Feed pets indoors, or clean up spilled food within an hour.
- Fix dripping spigots, gutters, and irrigation heads that keep the soil damp.
Burrows also collapse on their own over time, and excavation speeds that up. If you are already digging post holes for a deck foundation, backfill any old tunnel openings you uncover while the soil is loose, before the lawn work is finished.
Preventing Snakes From Returning
Prevention is a monthly maintenance routine rather than a one-time project. Walk the property line, check the foundation for new gaps, and keep the vegetation strategy consistent through the season.
A Monthly Perimeter Check
Look for fresh mounds, plugged burrows, and new gaps at ground level. Re-seat any weep hole screen that has been pushed out, clear leaves from the foundation line, and confirm that mulch beds have not crept up against siding. Ten minutes a month prevents most repeat visits.
Plan the Yard With the Burrows in Mind
Before a large landscape project, map the holes and the damp spots first. The same planning discipline that builders use to lay out materials for project planning applies to the yard: sketch the property, mark every burrow and problem area, and schedule repairs before planting rather than after. A yard that stays dry, short, and free of hiding spots stops being interesting to snakes, and the openings that remain belong to the animals that actually dug them.