Harris Mountain FireThe Harris Mountain Fire is a wildfire that started near Cascade, Montana on July 16, 2021. The fire has burned and is 20% contained.EventsJulyThe Harris Mountain Fire was first reported on July 23, 2021, at around 12:00 pm MST.CauseThe cause of the fire is believed to be due to lightning.ContainmentAs of August 5, 2021, the Harris Mountain Fire is 20% contained.