The article describes the conditions in beef cattle barns with deep-pit manure storage. Measurements were taken in three barns in Minnesota during different seasons. Air temperatures in the barns were similar to outside temperatures, but manure and floor surfaces were warmer. Air speeds were lower inside the barns. Nutrient levels in the manure varied between surface and agitated samples. Ammonia and sulfur concentrations increased closer to the manure surface. Ammonia levels were highest at floor level, reaching 8.5 ppm. These findings show how environmental factors and manure properties affect gas concentrations in cattle facilities.