Fire crews say high humidity and cooler temperatures helped them gain the upper hand.
The fire has burned through 250 square miles of the Angeles National Forest since it broke out nearly a month ago.
The fire is blamed on arson.
It claimed the lives of two L.A. County firefighters.
The fire destroyed 89 residences, 26 commercial properties and 94 outbuildings.
A $150,000 dollar reward is being offered for information leading to the arsonist.
City News Service contributed to this report.