The Moose Creek fire near Sutton is nearly half contained, according to fire information officials Wednesday.
Fire managers expect to have the blaze, which is at 46 percent, fully contained by the weekend.
The wildfire started Saturday morning, sparked by a burning debris pile.
High winds in the Matanuska Valley drove the fire to consume more than 300 acres.
Winds diminished on Tuesday, allowing fire crews to get a start on a line around the fire.
The western flank of the fire also has significant heat remaining that firefighters are trying to extinguish.
About 80 personnel are still working on the blaze.
