Do Chipmunks Dig Holes? How to Stop Burrowing

If you’ve spotted fresh holes near your steps, flower beds, or foundation edges, you’re probably wondering whether chipmunks burrows are the cause. Those small openings can look harmless, but they can also lead to underground tunnels that keep expanding. The good news is you can stop the digging by addressing what chipmunks want, then using proper exclusion.

What Chipmunks Dig and Why It Matters

Chipmunks dig because they live and store food underground. Their burrows create travel paths, nesting space, and storage chambers, so the damage isn’t limited to the surface hole. The more you understand how they dig and what the openings look like, the faster you can target the real problem.

How chipmunks burrow versus simple surface digging

Chipmunks create true underground burrows with connected tunnels, entrance holes, and interior chambers. When they dig, you usually see more than one spot of disturbed soil in a small area, because they’re working around a larger tunnel system. Surface scratching alone tends to be shallow and scattered, without a consistent round opening that lines up with a tunnel.

A practical way to tell: lightly inspect the edge of the hole. Chipmunk entrances look like a clean, round opening with compacted soil around it, and the soil disturbance forms a small ring. If you only see random dirt smears or shallow divots with no defined entrance, it’s more consistent with surface digging by another animal.

Signs a hole is from chipmunks, not squirrels or moles

Look for small, round entrances with tidy edges and minimal surface chaos. Chipmunk holes are smaller than squirrel dens and less broad than mole runways, and chipmunk activity often shows up at garden edges, along walls, and near low cover.

Use these clues:

Entrance diameter is small and consistent, with soil piled close to the opening rather than along a long straight line.

You find several openings clustered near shrubs, mulch lines, or steps.
The ground shows fresh dig-and-fill behavior, with loose soil around the entry point but not a large mound like some mound-building activity.

If you see big, open gaps, large tail-length tracks, or wide chew marks, focus on squirrels instead.

Where chipmunks usually start their tunnels

Chipmunks like quick access from cover, so they start near places that feel protected. Common starting points include garden borders, foundation edges, rock landscaping, wood piles, and dense shrubs. They also use existing openings in soil, such as cracks where edging meets ground level.

Check areas within a few feet of:

Steps, porch supports, and wall bases where they can stay close to shelter.
Flower beds and mulch beds with loose soil they can work through easily.

Retaining walls, where the ground meets stone and creates convenient travel lines.

When you map the entrances, follow the pattern. Multiple holes near the same wall section usually point to one connected tunnel system.

Understanding Chipmunk Burrow Structure

Chipmunk burrows are built for work underground, not just for making an entrance. Knowing the layout helps you remove attractants, block access, and avoid sealing something that is still active inside.

Common tunnel layout and entrance size

A chipmunk burrow system typically includes one main entrance, plus additional openings that connect to a network of tunnels. Entrances are small and round, and the tunnels angle down from the entrance, then branch toward chambers.

To estimate what you’re dealing with:

Measure the entrance opening width. Chipmunk holes are small enough that you usually cannot fit a finger deep into the opening without hitting compacted soil.
Watch where the displaced soil lands. Chipmunks often deposit loose dirt near the entrance rather than spreading it far.

Look for multiple nearby holes. Two to five entrances in the same patch often indicate a shared system.

If you only see one entrance with no other openings nearby, it still may have tunnels and chambers deeper underground.

How deep chipmunks burrow and what’s inside

Chipmunks dig deep enough to stay safe from surface predators and weather swings. Inside, they create nesting chambers and storage areas for food. That’s why simply filling the entrance right away can fail, and it’s also why exclusion works best when the burrow is inactive.

When assessing depth, avoid digging too aggressively. Instead, use light probing:

Insert a thin garden stake or similar tool gently into the entrance until you feel obstruction, then stop before you damage the tunnel.
Compare how far the stake goes at different entrances in the same spot.

Mark the approximate entry depth on your stake with tape so you can compare later.

If you notice no activity for several days and no fresh soil movement, the burrow is more likely to be inactive.

Why burrow systems often have more than one exit

Multiple exits help chipmunks escape danger. If a predator or disturbance blocks one entrance, they can move through another tunnel opening and avoid getting trapped. That’s also why you may find several fresh holes around a single garden section even if you only spotted one at first.

You can use this to guide your response:

Treat the area as one system, not separate problems for each hole.
Count all active openings within a small radius, then plan to exclude all of them.
Never assume “one hole closed” solves the issue if other openings are still open and accessible.

Burrows with multiple exits are one reason chipmunks can keep returning after partial repairs.

Why Chipmunks Dig Around Homes, Foundations, and Gardens

Chipmunks choose locations where digging is easy and they can find food. Your yard may be providing the perfect mix: loose soil, shelter, and stored or nearby meals.

Attraction to loose soil, shelter, and food

Loose, workable soil is a big draw. Mulch, garden beds, and loosened topsoil after watering create ideal digging conditions. Chipmunks also seek nearby shelter, like dense shrubs and stacked materials, and they hunt for food in the same areas day after day.

To reduce digging quickly, remove the menu and reduce cover:

Remove fallen nuts, seeds, and fruit from the ground within 10 to 15 feet of active holes.
Keep bird feeders clean and use ground-feeding trays or consider moving feeders farther from garden beds.

Tighten up storage, stack lumber higher off the ground, and clear brush piles that provide cover.

If you keep feeding them indirectly through landscaping and debris, burrowing returns.

Why they dig beside foundations and retaining walls

Foundations and retaining walls offer edge cover and stable travel routes. The space along the base is often easier to dig into because it’s filled with loosened backfill, grading materials, or areas where soil meets stone and concrete.

Focus on the exact edge zones that invite access:

Inspect around weep holes, vents, and expansion joints. Seal gaps after you confirm the burrow is not active.
Remove loose soil near the wall line where you find repeated entrances.
Replace easy-to-dig mulch at the base with firmer ground cover or edging that makes access harder.

Chipmunks don’t need to destroy concrete to cause problems, they just need a corridor for tunnels.

Why potted plants and flower pots get disturbed

Potted plants offer soft potting mix, a small protected space, and easy digging. Pots also let chipmunks cache food near the surface and hide in the root area. Even large decorative pots can become “starter zones” for shallow burrows or digging around the base.

Use targeted changes:

Replace loose potting mix in active pots with a tighter planting mix top-dressed with coarse grit.

Add a physical cover over the soil (a rigid layer like hardware cloth supported under the pot rim) so the surface is not workable.
Move pots away from walls and foundation edges if you see new entrances repeating in the same spot.

If you only cover the pot surface but keep nearby food on the ground, digging often shifts to another exposed area.

Risks of Chipmunk Burrows Near Your Property

Chipmunk burrows are small, but the risk comes from how they affect soil and drainage around buildings and hardscape.

Soil undermining, erosion, and small voids

Burrows create voids underground, and foot traffic or water flow can enlarge them. Over time, you may see sunken spots, small sinkholes, or erosion at the edges of beds and pathways.

Watch for:

Fresh collapses near entrances, especially after rain.
Loose or crumbling soil around the hole ring.
Small depressions that form a few inches from the entrance, where tunnels weaken the surface.

Fixing the digging early matters because water can carry soil down into the burrow, widening the problem.

Damage concerns for patios, slabs, and foundation edges

Chipmunks usually do not tear down foundations, but burrows along edges can weaken soil support. That can worsen settling near slabs, create voids under patio edges, and increase the chance that water finds a pathway.

Pay attention to these areas:

Patio or walkway edges where soil meets concrete.
Foundation corners and along retaining walls.
Cracks near the ground line where a tunnel could link into existing gaps.

If you see new cracking or separation near a cluster of entrances, focus on exclusion and soil stabilization, not only patching the visible hole.

When chipmunk activity becomes a bigger pest problem

Chipmunk burrows become more problematic when activity is repeated and multiple entrances remain open. Another sign is spreading to multiple yard zones, like gardens plus foundation edges, which indicates more than one active family area.

Escalate your response when:

You find new entrances after you’ve filled or disturbed a hole.

The same spot produces fresh soil mounds every few days.
Activity increases during seasonal changes, such as when young chipmunks are active.

At that point, humane exclusion planning and habitat changes need to work together.

How to Stop Burrowing Safely and Effectively

Stopping chipmunk burrowing is a two-part job: remove attractants so they stop settling, then block access properly. Do it in the right order so you are not trapping animals inside the burrow.

Remove food sources and yard attractants

Start by taking away the reasons they keep returning. Reduce ground-level food and make yard surfaces less hospitable.

Pick up fallen nuts, seeds, and fruit daily near entrances and along garden edges.

Store pet food in sealed containers, and clean up spilled kibble overnight.
Remove accessible birdseed and switch to feeders designed to prevent spillage onto the ground.

After a few days of reduced feeding opportunities, activity often slows, and burrows become easier to manage.

Seal openings only after confirming the burrow is empty

You should never seal entrances while animals are inside. If you close openings too early, you can trap chipmunks underground, creating distress and cleanup issues.

Wait until you see no fresh soil movement and no signs of activity for several days.
Use gentle monitoring, check entrances at consistent times, and look for fresh dirt or movement.

Only after the burrow appears inactive, fill the entrance with packed soil or a suitable filler, then add the exclusion barrier.

If you are unsure, use a humane wildlife professional for the right timing.

Use barriers, gravel, and habitat changes to discourage digging

Physical barriers make a major difference, especially around foundations and garden edges. Combine exclusion with habitat changes so they cannot keep creating new “starter” holes.

Install 1/4-inch hardware cloth around vulnerable edges and openings, bury it a few inches below grade so digging from outside cannot reach the gap.
Use 1/2-inch to 3/4-inch gravel in high-dig zones like between beds and walls, because it’s harder to break apart than mulch or loose soil.
Regrade or firm up loose soil along the foundation line, then top with stable ground cover.

Habitat changes reduce the urge to dig, which lowers the chance of repeat burrowing.

When steel wool can help and when it won’t

Steel wool can help block small gaps temporarily, but it is not reliable for long-term outdoor prevention. It can rust, shift with soil movement, or get pulled out by persistent animals.

Use steel wool only as part of a sturdier exclusion method, such as layering it inside a tighter fitting gap covered by hardware cloth.

Avoid relying on steel wool alone for open burrow entrances. The tunnel system is larger than what steel wool can handle outdoors.
Replace or reinforce after any soil settling or if you see new activity near the same edge.

For persistent burrowing, hardware cloth plus habitat changes is the dependable route.

Prevention Tips for Flower Beds, Pots, and Foundation Areas

Prevention works best when it starts where chipmunks want to dig. Make the surface less workable, reduce cover, and block access points before new tunnels form.

Protect container plants with tougher soil covers

Container plants need a surface chipmunks cannot easily dig into. A top cover reduces access to loose potting mix and makes caching harder.

Add a rigid cover over the soil surface in active pots, such as hardware cloth cut to fit and supported so it stays flat.

Use coarse topping materials like small gravel on top of soil rather than leaving bare, loose mix.
Keep pots off the ground when possible, or keep the area beneath them clear of debris that provides cover.

If chipmunks can dig into the potting mix, they will use the pot as a protected work zone.

Mulch and watering habits that reduce digging

Mulch can be useful, but thick, loose mulch keeps the soil workable and provides hidden access points. Watering patterns also affect how loose the ground becomes at the surface.

Keep mulch thickness moderate near foundation edges and garden borders, and avoid thick, fluffy layers right at the base of walls.
Water early in the day so the top layer dries sooner and becomes less friable.

When you see disturbed spots, replace the loose top layer with firmer coverage like gravel or compacted soil topped with stable ground cover.

These changes reduce the “easy digging” appeal chipmunks prefer.

Landscaping choices that make burrowing less appealing

Design choices can make the yard harder for chipmunks to use as a tunnel hub. Focus on edges, borders, and any place with soft soil and nearby shelter.

Install edging that separates garden beds from the foundation line so loose soil does not feed into gaps.

Reduce dense ground cover near walls by trimming shrubs back 2 to 3 feet from problem edges.
Stack firewood at least 18 inches off the ground and keep it away from entrances.

Make the protected, loose, continuous areas less available, and chipmunks spread out or stop digging in those spots.

When to Call a Wildlife or Pest Professional

Some situations need professional help, especially when burrows are active near foundations or you see repeated digging despite your efforts.

Signs of active burrows you should not close yet

If the burrow looks active, pause any sealing or patching and get correct guidance. Active burrows can mean nesting or young chipmunks underground.

Do not close openings when you see:

Fresh, newly disturbed soil around entrances within the last few days.

Ongoing activity, like chipmunks repeatedly entering and exiting during daylight gaps.
Multiple new entrance holes expanding in the same area.

Waiting for inactive timing is safer than guessing, especially around structures where exclusion must be done carefully.

Situations involving repeated foundation digging

Repeated foundation digging suggests the issue is not just one entrance. It often means a larger tunnel network and persistent access routes into protected edges.

Call a professional when:

New entrances appear along the same foundation segment after you’ve filled or disturbed holes.
You notice settling, separation, or new cracks near the ground line close to active burrows.
The burrowing spreads from the garden to structural edges.

Professionals can identify access points, apply exclusion correctly, and help protect the surrounding soil and hardscape.

When humane removal or exclusion is the best option

Humane removal and exclusion are best when you need a reliable long-term fix. Professionals can confirm activity, plan timing, and install exclusion materials so chipmunks cannot re-enter.

You should consider professional help when:

You cannot identify all entrance holes in a cluster.
The burrow is close to vents, crawlspaces, or other openings that require careful work.
You have pets or small children and want to reduce the chance of continued burrow openings near home areas.

The right exclusion approach is targeted, not temporary, and it prevents repeat burrowing.

Frequently Asked Questions

Do chipmunks dig holes or do they tunnel underground?

They do both. Chipmunks often leave small visible holes at the surface, but those openings usually connect to underground tunnels and chambers.

How can I tell if a hole is a chipmunk burrow?

Chipmunk burrows are usually neat, round openings with little loose soil nearby. They’re often found near walls, steps, shrubs, flower beds, or garden edges.

Will steel wool stop chipmunks from burrowing?

Steel wool may help block small gaps temporarily, but it’s not a dependable long-term fix outdoors because it can rust, shift, or be pulled out. Sturdy exclusion and soil/landscape changes work better.

Why do chipmunks dig in potted plants and flower pots?

They’re often attracted to loose potting soil, easy digging, and nearby food sources. Pots also provide a sheltered place to cache food or create shallow burrows.

Can chipmunks damage a foundation?

They usually don’t destroy foundations outright, but burrows along edges can weaken soil support, create voids, and worsen erosion or settling concerns over time.