Templin Highway and Fish Creek Area
Big Rock Wash Wildlife Sanctuary
Tiny bright-red with black bottom ant
Observed about a foot up the train from the juvenile horned lizard in https://www.inaturalist.org/observations/218796745. The lizard was not observed feeding on them and the ants were not surface-active until I prodded a stick down their hole to document what kind of ants they were, but I suspect this nest is why the horned lizard was around.