From paper wasps under the eaves to yellow jackets in the lawn — OBEX technicians locate the nest, treat with the right tool (spray, dust, or direct removal), and install preventatives to keep the next colony from moving in. Free quotes, same-week service.
No obligation. Tell us where the nest is and we'll get right back to you.
Every wasp job in Colorado starts with correct ID — the wrong product on the wrong species scatters the colony instead of ending it.
A ground yellow jacket colony doesn't respond to the same product as a paper wasp umbrella nest under the porch. We choose from four techniques based on species, nest location, and how much risk sits between the nest and your family.
Applied to nesting surfaces — eaves, soffits, fascia, sheds — where wasps land and rest. Provides both immediate knockdown at the nest and residual activity that continues to work as wasps return.
For ground nests and meter boxes. Foragers carry the dust back inside, taking out the colony from within. It's what makes ground yellow jacket work actually stick.
Where safe and appropriate, we physically remove the treated nest so it can't be re-occupied by a new queen next spring and isn't misread as a live threat by anyone in the family.
Exterior treatments around eaves, soffits, playsets, sheds, and trash areas discourage new queens from starting nests. We can't promise wasps never come back — new queens overwinter every year — but preventatives meaningfully lower the odds.
Yes — we treat ground-nesting yellow jackets and ground hornet colonies. They're just a different animal from a paper wasp under the eave: full protective gear, insecticidal dust worked into the entrance, and often a follow-up visit once foragers have carried the product back inside the colony. Because of the extra risk, gear, and time on-site, these jobs are handled a little differently than a standard wasp call. We'll walk through what your specific nest needs — and what it costs — on the phone before we roll a truck.
Overwintered queens emerge in April, colonies build through summer, and Front Range yellow jackets hit their peak in August and September before the first hard freeze ends the working colony.
Elevation, low humidity, and short but intense summers change how colonies grow and where they nest. Here's what actually matters along the Front Range.
Only mated queens survive Colorado winters, tucked into wood piles, sheds, and attic corners. They emerge in April and May, start a small nest solo, and colonies balloon through June and July. August and September are peak — the biggest colonies, the most workers scavenging, the most calls we take.
Wasps die off at the first hard freeze. Along the Front Range that's typically mid-to-late October in Denver and Longmont, earlier in Fort Collins, Greeley, and higher-elevation towns like Mead. After the freeze, the empty nest isn't a threat — but the mated queens who left it already are, hidden somewhere warm until spring.
Colorado's dry stucco eaves are paper wasp heaven. Irrigated Front Range lawns give yellow jackets the moist soil they need for ground nests. Cottonwoods along the South Platte, Poudre, and Big Thompson rivers are classic bald-faced hornet trees. Sun-baked south and west eaves get hit hardest at altitude.
Consumer wasp sprays have short range, no residual, and rely on you standing close enough to spray a defensive colony. Ground nests and protected outdoor spaces are almost impossible to treat from a can — you knock down the guards, agitate the colony, and 200 more come out the next opening.
A single paper wasp scouting your porch in May is not a colony. But once any of the following are true, waiting only makes the job bigger, slower, and riskier.
Every spring is a fresh start for mated queens waking up in neighboring yards. What we can do is make your property a worse place to build a nest than the one next door — and catch the ones that try before they mature.
Wasp, hornet, and yellow jacket control in every Front Range city below — and most of the smaller towns between them.
Field notes, ID guides, and treatment write-ups from the OBEX team — published on obexpest.com.
Field-guide walkthrough of the wasps and hornets Coloradans actually run into — with photos and behavior notes.
How to tell yellow jackets from bees, why they get aggressive in late summer, and what to do if you find a ground nest.
What a professional wasp nest removal actually looks like on a Denver home — from ID to treatment to prevention.
Honest read on why some Colorado wasp jobs need a follow-up visit — especially ground yellow jackets and hornets.
What changes for Colorado wasps in September and October — and why activity spikes before the first hard freeze.
Which DIY approaches have a real effect, which don't, and when a professional treatment is the safer call.
One call gets a licensed Colorado technician on the way — from Denver Metro up to Fort Collins. Free quote, no pressure.
