About 3 mm long, near mouth of harvester ant nest (Vermessor, formerly Messor).
Probably M. oregonensis based mostly on location, but maybe M. manni or something similar.
Barely active in the cool afternoon.
Golden Aster Heterotheca sessilflora ssp echioides. Open grasslands. Only know stand on the Preserve
Sunflower family? Looking for detail, genus, species