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Why Is My Lawn Full Of Mole Hills?
A Guide to the 2026 Breeding Season
Quick Answer: Why is mole activity increasing in Clitheroe right now?
Mole activity peaks in March and April due to the breeding season. Male moles (boars) aggressively expand tunnel networks to find mates, resulting in "Fortresses" and a sudden surge in mole hills. Local soil conditions in the Ribble Valley are currently ideal for this activity.
In the UK, the mole breeding season typically begins in late February and runs through to June, with peak activity occurring in March and April. During this window, male moles (boars) expand their tunnel networks aggressively to find a mate, often resulting in a sudden, frustrating explosion of molehills across previously pristine lawns.
With temperatures rising over the past few days across Clitheroe, Accrington, and Burnley, the local mole population is officially on the move. The spring-like conditions have kickstarted the breeding season, leading to more active digging and a rise in new mounds across the Ribble Valley and beyond.
If you are seeing fresh mounds of earth appearing overnight in Clitheroe, you aren't alone. This is the busiest time of year for a moles subterranean activity.
Why is Mole Activity Increasing Right Now?
Moles are usually solitary and highly territorial creatures. For most of the year, they stay within their established "home" tunnels. However, during the spring breeding season, the males go into an "overdrive" phase. They tunnel faster and further to intercept the tunnels of females (sows).
In late spring/early summer, when the pups are a few weeks old, the female will kick the pups out (not a parenting technique we recommend!). This leads to an increase of activity due to the pups leaving home and each seeking a territory of their own.
The "Fortress" Phenomenon
During the breeding season, you might notice one molehill that is significantly larger than the rest—sometimes the size of a football or larger. I have seen some with close on, a cubic metre of soil. In the industry, we call these "Fortresses" or "King-hills." These aren't just for food storage; they often protect the nest chamber where the female will raise her litter of 3 to 7 pups.
Signs You Have an Active Breeding Pair
Not every mound of dirt means a mole is "living" there; some are just transit tunnels. Look for these specific signs:
- Fresh, Damp Soil: If the earth is loose and moist, the mole is active right now.
- Surface Ridges: Shallow tunnels that look like raised "veins" on your lawn are a sign of a male on the hunt for a mate.
- Linear Hill Patterns: Moles often follow "leader" lines like fence rows, paths, or foundations.
Expert Tip: Moles are insectivores, not herbivores. They aren't eating your flower bulbs or vegetable roots—they are hunting for earthworms. The damage to your plants is usually a side effect of their tunnels "undermining" the root systems, causing them to dry out.
DIY vs. Professional Mole Control: Which is Best?
When molehills ruin a garden, many homeowners reach for DIY "scare" tactics. In our experience servicing Lancashire, here is how those methods actually stack up in 2026:
Method | How it Works | Effectiveness in Breeding Season | Safety Profile |
Sonic Spikes | Emits a vibration to "scare" the mole. | Low. Moles will often ignore or tunnel around the spike. | Safe, but noisy. No chemical risk, but can be annoying for pets with sensitive hearing. |
Home Remedies | Putting garlic, bleach, or mothballs in runs. | Ineffective. Moles simply block off that tunnel and dig a new one nearby. | High Risk. Bleach and mothballs can contaminate soil and harm local wildlife or inquisitive pets |
Professional Trapping | Skilled placement of hidden, humane traps. | High. This is the only guaranteed way to stop the damage during the aggressive mating push. | Safe. Traps are underground and out of reach. No gasses or poisons used—perfect for families. |
Protecting Your Clitheroe Property
Our local soil in the Ribble Valley provides the perfect environment for moles to thrive. While they provide some benefits, like aerating the soil and eating lawn-damaging grubs, the structural damage to a lawn or a professional sports turf can be expensive to repair.
If you have a "fortress" appearing or more than three new hills a day, the breeding activity is likely at its peak.
Our Local Rates:
Unlike national franchises, we keep our prices transparent for Clitheroe and surrounding areas residents. Our residential mole trapping starts from £60 per visit.
Need Help Fast?
At Wallace Pest Control, we specialize in traditional, effective mole control across Clitheroe, Accrington, and Burnley. We don't use gasses or poisons that could harm your pets or the local environment.
Would you like me to provide a free quote for a mole survey on your property? Click Here!
Areas Covered:
East Lancashire, Including; Clitheroe, Chatburn, Whalley, Sadben, Great Harwood, Accrington, Blackburn, Burnley, Nelson.
Written by Kane Wallace FRSPH, Mem.RES, ACIEH, Owner of Wallace Pest Control, Guild Of British Mole Catchers Qualified. With over 10 years of experience tackling mole infestations in and around Clitheroe.
