Snake Holes in Yard: What They Really Are (Snakes Don't Dig)

Here's the surprising truth: snakes don't dig holes. What people call a snake hole is almost always a burrow dug by a chipmunk, vole, or rat that a snake may — or may not — be using. A shed skin nearby, a smooth entrance with no fresh soil, and no mound are the signs a snake has actually moved in.

Most likely causes

  • Chipmunk burrow — clean 2-inch hole with no mound, the most common 'snake hole'
  • Vole openings — 1 to 1.5 inch holes connected by worn runways in the grass
  • Rat burrow — 2–3 inch smooth-edged hole near a foundation, shed, or compost
  • A snake occupying an abandoned rodent burrow — shed skin nearby, zero digging activity

Not quite what you're seeing? Answer four quick questions and the clue finder will point you to a closer match.

Compare the possible causes

Possible cause Key signs When it happens How likely
Chipmunk burrow A tidy, round 2-inch hole dropping straight down with no dirt pile, usually near a wall, foundation, or shrubs Dug and used spring through fall Very common
Vole holes and runways Openings 1 to 1.5 inches wide, flush with the ground, linked by narrow worn paths through the turf Year-round; the runway network is most obvious after snow melt in early spring Common
Rat burrow A smooth, compacted hole 2–3 inches across, often angled into the ground near structures, woodpiles, or food sources Year-round, with digging most active in fall Common
A snake using an old burrow An existing hole with a worn, smooth entrance, no fresh soil, no mound — plus a papery shed skin or a snake seen sunning nearby Late spring through early fall; snakes also winter underground in burrows below the frost line Less common
Cicada or beetle emergence holes Round, clean holes about 1/2 to 5/8 inch wide that appear suddenly in early summer, often many at once, going nowhere Late spring and early summer, especially in cicada years Less common

Visual clues to check

  • Look for a shed skin: a translucent, papery snake skin within a few yards is the strongest sign a snake is actually around
  • Check for fresh soil: recent digging means a rodent is the active tenant; a smooth, undisturbed entrance suggests the digger is gone
  • Confirm there's no mound: snakes never produce one, but neither do chipmunks — so 'no mound' alone doesn't prove a snake
  • Trace the surroundings: worn runways through the grass mean voles; greasy rub marks and nearby food sources mean rats
  • Scan sunny spots within 20 feet on a warm morning — rock walls, walkway edges, and mulch — where a resident snake would bask
  • Lay a band of flour or smooth raked soil by the entrance overnight: footprints mean rodents, a single wavy drag line means a snake

The causes in detail

Chipmunk burrow

When someone points at a 'snake hole,' this is usually it. Chipmunks carry excavated soil away in their cheek pouches, leaving a mysteriously clean entrance that looks like something slid in rather than dug in. Ironically, an abandoned chipmunk burrow is also prime snake real estate — so the ID can be both wrong and right at the same time. See all chipmunks signs →

Vole holes and runways

Voles chew golf-ball-size openings connected by 2-inch-wide surface runways, and the small smooth holes get blamed on snakes constantly. Follow the hole outward: if you can trace faint trails through the grass to other openings, you're looking at voles, not a snake den. See all voles signs →

Rat burrow

Rat burrows have polished, hard-packed entrances from repeated body contact, which gives them the slick 'snake hole' look. The tell is context — rat holes cluster near garbage cans, compost, bird feeders, and foundations, and usually show at least a little kicked-out soil. These matter more than any snake would, since rats move indoors as weather cools. See all rats signs →

A snake using an old burrow

Snakes lack the limbs to excavate, so they borrow: abandoned chipmunk, vole, and rat tunnels are ready-made shelters and hunting grounds. An occupied hole tends to stay open and clean with zero digging activity around it. Most snakes you'll find this way — garter snakes especially — are harmless residents that eat the very rodents that dug the hole, plus slugs and grubs.

Cicada or beetle emergence holes

Cicada nymphs and large beetles tunnel up out of the soil, leaving smooth finger-width exit holes with no mound that people sometimes read as baby snake holes. These are one-way doors — nothing lives in them — and they collapse on their own within weeks. No action needed.

When to worry

  • You live in rattlesnake, copperhead, or cottonmouth territory and see a thick-bodied snake with a triangular head near the hole
  • A shed skin longer than 3 feet, or multiple skins, near a burrow close to a patio, sandbox, or play area
  • Snake sightings combined with signs of an active rodent population — the food supply that attracts and keeps snakes
  • A snake repeatedly seen entering gaps in your foundation, crawl space vents, or garage rather than a yard burrow

What to do now

  1. Identify before acting: photograph any snake you see from a safe distance and compare it against your state wildlife agency's species guide
  2. Leave harmless snakes alone — a garter snake is free pest control, eating slugs, grubs, and the rodents that dug the hole in the first place
  3. Remove what attracts snakes: mow tall grass, clear brush and wood piles, and fix the rodent problem that supplies both burrows and food
  4. Fill confirmed-empty burrows with packed soil or gravel in late morning on a warm day, when a resident snake would likely be out
  5. Seal gaps under sheds, stoops, and foundations with hardware cloth once you're sure nothing is living inside
  6. If you suspect a venomous species has taken up residence, keep people and pets away and call a professional wildlife removal service — many will relocate the snake the same day

What not to do

  • Never reach into a hole or probe it with your hand — this is how the majority of preventable snake bites happen
  • Never pour gasoline, kerosene, or sulfur down a burrow; it doesn't reliably evict snakes, it contaminates soil and groundwater, and it's illegal in many areas
  • Don't try to kill or handle a snake you can't identify — most defensive bites occur during exactly this attempt, and in many states native snakes are legally protected
  • Don't buy mothballs or ultrasonic 'snake repellers' — neither has evidence behind it, and mothballs used outdoors violate the product label
  • Don't plug a hole the moment you see a snake enter; a snake sealed under your yard or shed will search for another way out, sometimes indoors

Frequently asked questions

How can I tell a chipmunk hole from a snake hole?

You mostly can't by the hole alone, because a 'snake hole' usually is a chipmunk hole — snakes don't dig. Look at the activity instead: fresh soil disturbance, daytime sightings, and seed caches point to a chipmunk still in residence, while a shed skin, a drag mark in dust or flour, and a snake basking nearby mean a snake has taken over.

What does a snake hole look like in a yard?

It looks like whatever rodent burrow the snake borrowed: typically a smooth, round opening 1 to 3 inches across with no mound and no fresh soil. The snake-specific clues are around the hole, not in it — shed skins, wavy drag lines in dust, and a snake sunning within a few yards on warm mornings.

Are the snakes in my yard dangerous?

Usually not. The snakes most often found in American yards — garter snakes, rat snakes, ring-necked snakes, and racers — are non-venomous and eat rodents, slugs, and insects. That said, learn which venomous species live in your region, and treat any snake you can't confidently identify as hands-off.

How do I get rid of snake holes for good?

Fix the cause, not the hole. Snakes show up because rodents dug shelter and provide food, so controlling voles, chipmunks, or rats removes both. Then fill confirmed-empty burrows with packed soil, keep grass short, and clear brush and wood piles where snakes hide. Repellents and mothballs won't do it.

Do snakes hibernate in holes in the yard?

Yes — snakes brumate through winter in burrows, rock crevices, and foundations that reach below the frost line, and old rodent tunnels are a favorite. A hole that stays mysteriously open all winter with a snake sighting the previous fall may be a winter den, so fill it in summer, not in October.

Related yard clues

Yard Holes Animal Holes in Yard: Identify the Digger by Hole Size The fastest way to identify an animal hole in your yard is by its diameter: pencil-width openings are insects, 1–2 inch holes are voles or chipmunks, 2–3 inch smooth holes suggest rats, 3–4 inch cone-shaped pits point to skunks, and anything 10 inches or wider with a fan of dirt is a groundhog. Whether there's a mound, whether the hole tunnels down or stays shallow, and when it appeared tell you the rest. Read the guide → Yard Holes Two-Inch Holes in Yard: Chipmunk, Rat, or Something Else? A round hole about two inches across is classic burrow size, and the usual suspects are chipmunks, rats, and thirteen-lined ground squirrels. Chipmunk holes are clean with no soil pile, rat holes are worn and hug structures, and ground squirrel holes sit in open, sunny lawn — those three clues sort out most cases. Read the guide → Yard Holes One-Inch Holes in Lawn: Identify the Digger by Size Holes about an inch wide in a lawn are most often the work of voles, young chipmunks, ground-nesting bees, or — in wet, low-lying yards — crayfish. An inch is a telling size: it's too big for most insects and too small for rats or full chipmunk burrows, so checking depth, soil, and location will usually name the digger. Read the guide → Yard Holes Holes Near Your Foundation: Causes and When to Act Holes right along a foundation usually come from chipmunks, Norway rats, or voles, all of which like the shelter a house wall provides — but water pouring from downspouts and settling backfill soil carve foundation-line holes too. Sorting burrow from washout matters, because a rat burrow against the house is the one that needs fast professional attention. Read the guide → Yard Holes Small Holes in Yard With No Mound: What's Digging? Small holes in your yard with no dirt mound are usually caused by squirrels, chipmunks, foraging birds, earthworms, or ground-nesting insects. The size of the hole, how deep it goes, the time of year, and whether the damage appeared overnight can narrow down the cause quickly. Read the guide →

Still not sure? Compare with these clues

Yard Holes Tunnels in Grass: Mole or Vole? How to Tell in Seconds Tunnels in a lawn come in two distinct styles: raised, spongy ridges you can feel underfoot are mole feeding tunnels just below the surface, while flat, worn trails clipped into the grass itself are vole runways. Moles hunt worms and grubs under your turf; voles eat the grass and bark on top of it — so telling them apart decides everything about what to do next. Read the guide → Yard Holes Deep, Narrow Holes in the Yard: 5 Likely Causes A narrow hole that drops straight down and seems to go forever is usually a crayfish burrow, a cicada killer wasp tunnel, a vole shaft, or an old rodent burrow now used by a snake. Whether there's a mud chimney, a soil fan, or nothing at all around the opening is the fastest way to tell them apart. Read the guide → Tracks, Nests & Outdoor Clues Animal Burrow Under Your Shed? Who's Living There A burrow entrance under your shed most likely belongs to a groundhog, skunk, rabbit, or rat, and the hole itself usually names the digger: groundhogs leave a 10–12 inch opening with a fan of excavated dirt, skunks announce themselves by smell, and rat holes are only 2–3 inches across. Before evicting anyone, check the calendar — from spring into midsummer there may be babies down there, and sealing them in creates a far worse problem than the burrow. Read the guide → Yard Holes Quarter-Size Holes in Yard: Wasps, Cicadas, or Voles? Holes about the size of a quarter — roughly an inch across — most often belong to cicada killer wasps, emerging cicadas, ground-nesting bees, or voles. The soil is the fastest clue: a big horseshoe of excavated dirt means a cicada killer, a clean hole with no soil means a cicada came out of it, and a small crumbly rim means bees. Watch briefly from a distance before getting close, in case wasps own it. Read the guide →