Here is a very comprehensive link that discusses how to get rid of ants in the yard; I have put in quotes below the link some of the most salient notations (e.g. getting rid of all ants is pointless; spot treatment of nests may work if you use a toxic bait such as Borax, but keep pets and children away from bait....many "home remedies", ie hot water, vinegar, don't work as nests are buried deep underground 

https://sam.extension.colostate.edu/wp-content/uploads/sites/44/2018/07/July-28-2018-Ants-in-the-Garden.pdf

“A campaign to rid your garden entirely of ants is not just pointless, it is a bad idea. However, spot treatment to preserve the appearance of your garden may be required. While I am generally not a fan of killing beneficial insects, there is little danger spot treatment by the home gardener will really make a dent in the local ant population.

“The best approach to eliminate a colony is probably toxic bait. You must get the ants to carry a toxin into the nest where it will be ingested by all ants including the queen(s). That means a slow acting toxin mixed with something the ants will find appetizing. Boric acid (Borax) is a common bait toxin. Mixed with jelly, honey or peanut butter, and set out next to tunnel entrances can effectively wipe out a colony. This is not an instant fix, it may take several bait traps and a couple of weeks to finish the colony off. Traps can be purchased or you can make homemade traps. Do not sprinkle borax directly on soil it can deter plant growth. Keep pets and children away from the bait.

https://extension.colostate.edu/topic-areas/insects/ants-in-the-home-5-518/

The above link discusses how to get rid of ants outside as well as inside the home.

This link reviews types of ants found in Colorado lawns:

getting rid of ants in lawn.csu.edu

Good luck!