The Harris Mountain Fire is a wildfire that started near Cascade, Montana on July 16, 2021.

The fire has burned 31,460 acres (12,731 ha) and is 20% contained.

[1] The Harris Mountain Fire was first reported on July 23, 2021, at around 12:00 pm MST.

[1] The cause of the fire is believed to be due to lightning.

[1] As of August 5, 2021, the Harris Mountain Fire is 20% contained.