Dealing with a pest problem in Westminster? You're not alone. mice, voles, ants are among the most common household pests in the Colorado Front Range — and they're active year-round.
Westminster sits at the seam between Denver and Boulder, with Big Dry Creek and the Farmers High Line Canal running through established neighborhoods. Mature trees and older housing stock in the eastern half of the city create persistent entry points for mice — particularly in fall when field rodents move out of the surrounding open space.
spring
Ants emerge as soil warms. Wasp queens begin scouting for nest sites. Mice move back outdoors but may still enter structures.
summer
Peak wasp and ant activity. Brown recluse and black widow spiders active. Voles damage lawns and garden beds.
fall
Primary rodent season — mice and voles seek indoor shelter as temperatures drop below 40°F. Boxelder bugs congregate on south-facing walls.
winter
Indoor rodent activity peaks. Overwintering insects shelter in wall voids and attic spaces.
Westminster was once home to Elitch Gardens before the amusement park relocated to Denver in 1995. The former site is now a mixed-use development, but the city retains one of the highest rates of single-family homeownership in the metro.