[header] How to kill a mole [title] Look for signs of mole activity in the spring and fall. [step] These are the seasons during which moles are most active and dig close to the surface. They tend to burrow deeper underground in the winter, making them harder to catch in the colder months. 
Moles give birth late in the spring, so trapping them before the beginning of summer will help to control the mole population. Plan to set your mole traps during spring or fall for best results.