Officials say the fire, nicknamed the "Dump Fire" because it is near a landfill, was sparked by target shooters.
Several agencies including the Bureau of Land Management, the U.S. Forest Service and Utah County are working to push back the fire line.
Two helicopters and multiple ground crews are also on scene.
Only 20 percent of the fire is contained and firefighters estimate it will take another two to three days to completely contain it.
The fire is burning near homes in Saratoga Springs and Eagle Mountain, but so far they have not been threatened and no evacuations have been ordered.