Experts and BHG readers answer.
How do I get rid of voles in our lawn...
If you're seeing mounds of soil in your yard, your problem is not voles. Voles live on top of the ground, sometimes making trails in grass right at the soil surface.
What you're describing is likely either mole or gopher damage. Moles push up long trails of soil, while pocket gophers create scattered mounds. The most certain way to rid your lawn of either of these pests is by trapping. Several types of traps are available for either pest. Repellents containing castor bean oil have also been proven effective for moles. However, the repellent must be reapplied periodically.