Air quality will be unhealthy for all groups tomorrow, according to the San Joaquin Valley Air Pollution Control District.

Valley Air is predicting an air quality reading of 156.

As of 4:45 p.m. on November 17, the Bakersfield Marathon, which is scheduled for Sunday, November 18, will still go on. In a post to the Bakersfield Marathon's Facebook page, the organizers are allowing runners to switch their races to a shorter distance.