A little late in the season, but they are where you find them. Any place east of the Cascades in Washington.
There are a lot of smaller ranchettes that offer good shooting with Hornets or similar. The long range stuff is there but it takes a good idea of what you are looking for to find them. Anything close to the roadways has been shot down or if it is found it will be a place that you will either not get access to or will end up with a trespassing ticket and/or a shooting along, across or from the public road citation.
Trust me on that, I have seen more than a few of them handed out.
A pair of big eyes binocs is your best friend or a Leupold Gold Ring spotter that goes to 12 power and has wide field of view. That also means you have to be able to see them at 12-15 power from a quarter to half mile out. Many people can’t even through my spotter with reticle on them. They blend in at the times when they are out in the morning and evenings.
They den on rocks, wood piles, old irrigation pipe and under buildings and prefer alfalfa or maybe young corn fields to dine in. You need both or you are wasting your time looking.
This is a decent year for chucks, not spectacular, but decent enough that I saw a few hundred last week. I wasn’t shooting though, I was camping with my kids and just noticed them driving around to activities. I can see them fairly easily at 500 yards but again I had to stop and put a scope on em for the kids to see them.
It takes a lot of looking for chucks for most people to get fairly efficient at locating shootable colonies from the roadways. It also takes a bit of time developing relationships that result in invitations to talk to friends, relatives and acquaintances of ranchers and alfalfa growers who also have chucks in their irrigated crops.
Finding them where you might be given access is one thing, getting access without references is another.