How do you naturally get rid of ants that create mounds in the yard?

apply food grade diatomaceous earth

.Diatomaceous Earth (often referred to as "DE") is an off white talc-like powder that is the fossilized remains of marine phytoplankton. When sprinkled on a bug that has an exoskeleton (such as bed bugs, ants or fleas) it compromises their waxy coating so that their innards turn into teeny tiny bug jerky.

I have ants here in Georgia and I use hot or boiled water since I have two very small dogs and don't use chemicals around their areas. It does work.

I use baking sofa on top of and surrounding the mound. Cheap and it works. It kills the ants by swelling in their stomachs.