Muddy Slide FireThe Muddy Slide Fire was a wildfire that started near Yampa, Colorado, United States, on June 20, 2021. The fire burned and was fully contained on September 14, 2021.EventsJuneThe Muddy Slide Fire was first reported on June 20, 2021 at around 3:00 pm MST.CauseThe cause of the fire is believed to be due to lightning.ContainmentOn September 14, 2021, the fire reached 100% containment.