The short version
Moles are usually one to three animals. Find an active tunnel, then trap it. Repellents and sonic stakes rarely work.
- Usually one to three moles.
- Find an active runway first.
- Traps work best; repellents rarely do.
- Moles eat earthworms, not plants.
- Fix the lawn after trapping.
Homeowners in Olympia with tunnels, ridges or mounds in the lawn.
What to look for
Moles don't eat plants. They hunt earthworms and grubs. Their tunnels lift turf, dry out roots and trip people up. Moles around Olympia are busiest in spring and fall. They tunnel near the surface after rain. One mole can dig a lot of tunnel.
- 1Raised ridges across the lawn.
- 2Round, volcano-shaped dirt mounds.
- 3Spongy patches underfoot.
- 4Tunnels along walkways and beds.
- 5Fresh mounds after rain.
- 6Dead turf strips over tunnels.
Why it’s worth acting soon
- Tunnels spread across the lawn.
- Mounds make mowing harder.
- Ridges become trip hazards.
- New moles move into empty tunnels.
Treatment options and typical costs
Runway Identification and Activity Survey
$75–$200
Not every ridge is active. Moles abandon many feeding tunnels after one pass. The survey finds the main runways connecting nests to feeding areas. Those straight, long-used tunnels are where control in Olympia works best.
- Time
- 45–90 minutes
- Best for
- Every job; trapping fails without it
Lawn, Moisture, and Bed Exclusion Work
$150–$450 depending on scope
Grub control is often sold as mole control, with real limits. Moles eat mostly earthworms, so an Olympia lawn with no grubs can still host them. In Olympia, a provider should be honest that habitat work supports trapping rather than replacing it.
- Time
- 1–4 hours
- Best for
- Repeat problems; protecting beds and small areas
Mole-Labeled Baits
$100–$300 per application
Ask any Olympia provider what product they use and to confirm it is labeled for moles. Label directions are legally binding, and off-label use is not acceptable. Used correctly, baits give Olympia yards a second tool alongside traps.
- Time
- 30–45 minutes
- Best for
- Large or hard-to-trap areas; used exactly as labeled
Active-Runway Trapping
$150–$400 per visit; multi-visit plans $300–$900
Trapping is the method most extension services recommend for moles. Traps go over confirmed active runways. They're rechecked within a day or two. Traps that go untouched get moved to fresh Olympia runways.
- Time
- 30–60 minutes per visit, over several visits
- Best for
- Most yards; the most reliable method
Prices are typical published ranges. Ask what’s included before you compare quotes.
Hardware cloth buried around beds keeps moles out of the places you care about most.Which moles live around Olympia.
Around Olympia, Townsend's, coast or broad-footed moles do the digging. They push up more mounds than eastern moles. Moles are insectivores, not rodents. They eat earthworms and grubs, not roots.
When they tunnel.
Mild winters keep them near the surface. Summer heat and drought also push them down.
Raised ridges are feeding tunnels just under the turf. Many are used once and abandoned.Finding an active tunnel.
Look for fresh ridges and mounds after rain. Step down a short stretch of tunnel and mark it. Check it in a day or two. If it's raised again, it's active. Main runways often follow edges: walks, fences and beds. Lawns from Olympia out to Tacoma and Federal Way show the same pattern.
A year of moles in Olympia.
- Spring: peak tunneling. Best time to trap. - Summer: highs near 78°F in Olympia push moles deeper. - Fall: a second burst near the surface. - Winter: mild in Olympia. Moles stay active.
Mole, gopher or vole?
- Mole: raised ridges and round, volcano-like mounds. - Gopher: crescent-shaped mounds with a plugged hole. - Vole: surface runways and small holes in the grass. - Damage: moles don’t eat plants; gophers and voles do.
What works, and what doesn’t.
- Works: traps set in active runways. - Sometimes: labeled baits, used deep in tunnels. - Rarely: castor oil, sonic stakes, gum or flooding. - Rarely alone: grub control, since they mostly eat earthworms.
Protecting garden beds.
Bury quarter-inch hardware cloth around beds, about two feet deep. Bend the bottom edge outward. Raised beds can get a mesh floor before you fill them. It's work up front, but it lasts for years.
Lawn care that helps.
Water deeply but less often. Constantly wet lawns draw earthworms, and moles follow. Healthy turf recovers from tunnels faster. Grub control alone rarely moves moles on.
Signs the problem is over.
- No new mounds for two weeks. - Stepped-down runways stay flat. - Traps stay untouched for several checks. - New ridges? Another mole may have moved in.
Choosing a trap.
- Scissor traps: set straddling an active runway. - Harpoon traps: set on top of a pressed-down ridge. - Tunnel traps: sit inside a dug-out runway. - Placement: main runways beat fresh feeding ridges. - Rules: check what your state allows first.
Mole myths.
- Chewing gum in tunnels: no evidence it works. - Castor oil: may move them briefly, not away. - Moles eat bulbs: no, voles using their tunnels do. - Many mounds, many moles: usually it’s one or two. - Flooding tunnels: they just dig new ones.
Moles aren’t all bad.
Moles loosen and aerate soil. They eat grubs and other insect larvae. A mole in a field may be fine to leave. In a front lawn or garden, most people want them gone.
Fixing the lawn afterward.
Wait until the mole is caught. Rake mounds flat and step ridges down. Water to settle the soil. Overseed bare spots in spring or fall.
Moles, kids and pets.
Moles don't bite unless handled. Keep kids and pets away from traps. Baits must go deep in tunnels, exactly as the label says. Digging dogs can wreck a lawn faster than moles.
What a mole visit looks like.
The tech walks the lawn and maps the tunnels. They test which runways are active. Traps go into the main runways. They check traps every day or two.
Moles, voles or gophers?
- Moles: raised ridges and round, volcano-shaped mounds. - Voles: narrow surface runways through the grass. - Gophers: crescent-shaped mounds with a plugged hole. - Chipmunks: small clean holes with no soil around them.
Watering and moles.
Moles follow moist soil, where worms rise near the surface. Water deeply and less often instead of a little every day. Fix leaky sprinklers that leave soggy corners.
Flower beds and borders.
Moles tunnel under beds looking for worms, not to eat plants. Plants wilt when their roots are left hanging in air pockets. Press tunnels down firmly and water to settle the soil.
Questions to ask before you sign.
- Is it a mole, gopher or vole? - Which method will you use? - How often will you check traps? - What if another mole moves in? - Is lawn repair included?
Moles by the numbers.
In Olympia, moles do not eat plants; they tunnel for earthworms, grubs, and soil insects, and the ridges they leave behind are what most people notice. In Olympia, tunnels often run just under the surface, with deeper nesting chambers below, and a single mole can maintain an extensive system across a yard. In Olympia, because moles are solitary, several fresh ridges usually mean more than one animal. In Olympia, before you hire, walk the yard and flatten a few ridges with your foot, then check back the next day — the ones that are raised again are the active runs a plan should target.
What affects the price
- Irrigation and drainage corrections.
- Provider type: wildlife operator versus lawn company.
- Single visit versus a multi-visit trapping plan.
- Access around fences, slopes, and dense plantings.
- Travel distance to rural properties.
- State rules that affect trap or bait choices.
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What bothers you most about moles?
When to call for help
if you can't find an active runway. A pro can usually catch the mole within a few visits. Call if new mounds keep appearing for more than a week.
What you can do yourself
Set the trap exactly as the instructions say. Skip sonic stakes, gum and flooding. Trapping yourself can work.
Moles in Olympia
With about 51 inches of rain a year, Olympia keeps soil soft and full of earthworms, which moles love. Winters around Olympia are mild enough that moles can stay active near the surface. In Olympia's neighborhoods, irrigated lawns and garden beds are favorite spots. In Olympia, the marine west coast climate means moles activity tends to follow spring and fall; active year-round in mild soil, so scheduling the visit before the busy stretch usually means a faster response and a cleaner quote.
Local research
Moles in Olympia, WA: what the public record shows
Before you compare quotes, it helps to know which moles actually live in Washington, when they are busiest around Olympia, and what the state figures look like. Everything below links to the agency or university page it came from.
Mole species recorded in Washington
- Townsend's mole (Scapanus townsendii) — Largest North American mole (8-9 inches); lawns west of the Cascades.
- Coast (Pacific) mole (Scapanus orarius) — Drier, brushier habitats including interior sagebrush.
- Shrew mole (Neurotrichus gibbsii) — Smallest North American mole; does not make molehills.
When moles are busiest around Olympia
Wet season west of the Cascades.
Moles are unclassified; owners may trap or kill them on their property when causing damage, within the trap law.
Rules that apply in Washington
Sources: Living with wildlife: Moles; Internet Center for Wildlife Damage Management; Virginia Cooperative Extension (Virginia Tech). Figures are quoted as the source prints them. How we check our sources
Simple ways to keep moles away
- Edge beds with buried hardware cloth.
- Check for fresh mounds after rain.
- Act early in spring.
- Fix tunnels only after trapping.
- Skip sonic stakes and castor oil.
Ask what the quote covers if another mole moves in after the first one is caught.Did you know?
Moles can tunnel quickly through soft soil in soft soil
One mole can hold a territory over an acre
Questions people ask
What kind of traps do professionals use?
Usually scissor or harpoon traps set in active runways. They're the most reliable method.
Why do repellents and sonic stakes not work on moles?
Moles get used to them or tunnel around them. Studies show little lasting effect.
Can I just flood the tunnels or fill them in?
It rarely works. Moles dig new tunnels or move a few feet away.
Is the mole still in my yard?
Step down a short section of tunnel. If it's raised again in a day or two, it's active.
Should I repair the lawn before or after trapping?
After. Fixing it first hides the tunnels you need to find.
Is an annual mole control contract worth it?
It can be, if the animal keeps coming back. In Olympia, a seasonal contract often costs little more than a single visit while covering the peak activity months. In Olympia, compare what each plan includes and ask whether follow-up visits are covered before you commit.
Do mole exterminators charge per mole?
Some do. In Olympia, per-animal pricing means the bill scales with how many are caught, while a flat-rate program covers the whole job regardless. In Olympia, ask which structure the provider uses, since the two can produce very different totals.
When are moles most active in Olympia?
Spring and fall, especially after rain. Mild winters keep some activity going year-round.
Are moles common in Olympia?
Yes.
Nearby cities
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Sources (5)
The facts in this article come from the public sources listed above. Every home is different, so ask the company you talk to about pricing and what’s included. Published by Mole Exterminator · Updated September 11, 2026 · How we write these guides