Pest Control in Longmont, CO
Dealing with a pest problem in Longmont? 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.
Longmont's agricultural surroundings — irrigated fields, grain storage, and drainage ditches — support large field mouse and vole populations that push into residential areas each fall. Properties near farmland or the St. Vrain Creek corridor see the highest rodent pressure on the Front Range.
Common Pests in Longmont
- mice
- voles
- ants
- wasps
- spiders
- earwigs
- boxelder bugs
Pest Activity by Season
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.
Longmont sits in the St. Vrain Valley between Denver and Fort Collins, with active agricultural land on its eastern edge that directly borders residential neighborhoods — one of the few Front Range cities where farm fields and subdivisions share a fence line.
Learn More
Browse all pest control guides →Get connected with a local expert
- ✓Free quote — no obligation
- ✓Licensed & insured professionals