Every summer and early fall, Bozeman residents brace for the haze that drifts in from regional wildfires. Though picturesque on the horizon, that smoky veil carries a hidden threat—you’re breathing in microscopic particles known as PM₂.₅. These tiny enemies can sneak indoors, settling in carpets, infiltrating HVAC systems, and even passing through typical household filters. What can you do about wildfire smoke in Bozeman, MT? Here are our top tips.