A lot of times the nest is below ground. Wait until near sundown and you’ll see them entering the nest. Once you’ve located the entrance in the ground, just spray some wasp killer down the entrance. They won’t make it back out once you’ve hit the entrance with the wasp killer.
I ran over a nest with my lawnmower a couple weeks ago. Fortunately they attacked the lawn mower and I was able to just walk away. Lawnmower did not seem too traumatized by the experience.
It is hard to sit on my back deck this time of year with any kind of drink or food. They crawl right into my beer glass.
Unfortunately for me, I discover the nests a simpler way...
I ride over them with my tractor while cutting the grass.
The stings really alert me to the problem.
After much cussing, I then look for the nest.
Then I kill them all in revenge.